Author: Ian Hetherington

Latch length: How long are the latch bolts on our bolt-on locks?

We often get asked questions regarding the latch lengths for our bolt-on locks:

  • How long is it?
  • How much does it throw?
  • How much will it stick out?

close up image of latch bolt on bolt-on lock for metal gate

To make an easy overview of the different measurements above, we have created this guide for our bolt-on lock ranges – the Superlock and the Select Pro range.

Below you will find a drawing outlining the different key measurements to know about latch bolts and dead bolts as well as a table overview with all the measurements for our locks.

The table is split into the lock variation as we have two sizes:

  1. 10-30mm gate frames
  2. 40-60mm gate frames

When checking the dimensions for your lock, please check the product code and size for the right dimensions.

Deadbolt and latch length (bolt-on locks)

The actual dimensions that the latch will protrude from the front plate of the lock are shown in the diagram and chart below.

Dimension A in the below overview shows the dead bolt/latch bolt dimensions from the front of the bolt-on lock and through the gate frame when the lock isn’t operated (resting). All our bolts are adjustable by simply twisting the bolt in or out and locking in place with the supplied allen key. In the table further down you can find the minimum and maximum parameters of the bolts based on their adjustability.

Dimension B is the latching movement. This is how much the latch retracts when the handle is operated, pulling the latch back. The latching movement enables the gate to be pushed shut as the bolt will retract as it hits the striker and then spring out into the keep or post, holding it closed.

Dimension C is then the deadlocking (extending) movement and only applies to the locks that can be deadbolted extra. When turning the key to deadlock the gate, the dead bolt will extend this much into the gate post.

Please find all the measurements in the two tables below. Note that these only apply to our bolt-on locks in the Superlock and the Select Pro ranges.

Diagram of latch lengths of bolt-on locks within gate frame.
Dimension explainer:
A = How far the locking bolt protrudes from the lock in its standard resting position
B = Latching (retracting) movement
C = Deadlocking (extending) movement
Ø = Diameter of the locking bolt

Latch lengths for 10-30mm gate frame bolt-on locks

ProductA – length, minA – length, maxB – latching movementC – deadlock movement
Superlock BLD
27 mm53 mm15 mm15 mm
Superlock BD
15 mm43 mmN/A15 mm
Superlock BDG
27 mm53 mm15 mmN/A
Superlock BDGS
27 mm53 mm15 mmN/A
Superlock BQK
27 mm53 mm15 mmN/A
Superlock BQDG
27 mm53 mm15 mmN/A
Select Pro SBD
11 mm38 mmN/A30 mm
Select Pro SBLD
26 mm54 mm13 mm30 mm
Select Pro SBKLLT
34 mm62 mm20 mmN/A
Select Pro SBL
22 mm54 mm13 mmN/A
Select Pro DGL
35 mm65 mm22 mmN/A
Select Pro DGLS
35 mm65 mm22 mmN/A
Select Pro SBQEDGL
35 mm65 mm22 mmN/A
Select Pro SBQEKL
35 mm65 mm22 mmN/A

Latch lengths for 40-60mm gate frame bolt-on locks

ProductA – length, minA – length, maxB – latching movementC – deadlock movement
Superlock BLD
57 mm83 mm15 mm15 mm
Superlock BD
45 mm73 mmN/A15 mm
Superlock BDG
58 mm84 mm15 mmN/A
Superlock BDGS
58 mm84 mm15 mmN/A
Superlock BQK
58 mm84 mm15 mmN/A
Superlock BQDG
58 mm84 mm15 mmN/A
Select Pro SBD
40 mm68 mmN/A30 mm
Select Pro SBLD
58 mm86 mm13 mm30 mm
Select Pro SBKLLT
68 mm95 mm20 mmN/A
Select Pro SBL
60 mm86 mm13 mmN/A
Select Pro DGL
68 mm95 mm22 mmN/A
Select Pro DGLS
68 mm95 mm22 mmN/A
Select Pro SBQEDGL
68 mm95 mm22 mmN/A
Select Pro SBQEKL
68 mm95 mm22 mmN/A

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Keyless combination lock for wooden gates

keyless combination lock for wooden gate with mechanical keypad on both sides.

Wondering what the benefits for a keyless combination lock for wooden gates are?

Keyless entry for wooden gates is increasingly popular for gate owners. Door locks with a combination code are frequently used internally in buildings, for convenience and also security. There are a number of advantages of this method of securing a point of entry, including:

  • Eliminates the need for a key, which is convenient especially in larger properties or organisations where there can be several entry points needing a key
  • Keys can present a security concern for any property when they are lost, potentially giving an outsider unhindered access
  • An effective option where multiple users need entry, as a code can be easily distributed rather than giving out keys
  • If security is breached the code can be changed, whereas a keyed lock would need to be replaced and new keys cut
  • A combination lock is often more secure than a keyed lock, as keyholes can be a point of weakness for the lock. Experienced lock-breakers can gain access by picking the lock, or by inserting something into the keyhole and forcing their way in
  • A keypad lock’s mechanism is mainly concealed inside, giving better security and also higher durability against moisture and rust

Keyless combination lock for wooden gates

Keypad locks that are designed specifically for gates are a lot less common.  While standard keypad door locks are often used on gates, they are far from ideal.  One of the main reasons for this is that the latch is designed for the often small gap between the door and frame, whereas gates often have far larger tolerances.  This is often due to gate hinges being more heavy duty but less precise than door hinges.

Wood changes its moisture content as a response to the humidity in the air, meaning it will shrink when drier and expand when more humid. Therefore, the locking mechanism needs to allow for these changes and be secure enough to compensate for potential shifting, warping, and swelling of your gate.

The Gatemaster Solutions

Getting a suitable lock is therefore recommended and luckily we have a range to suit. A keyless combination lock for wooden gates could be the way to secure your garden gate!

We have expanded our range as well to offer more options for a secure gate. As we aim to simplify gate hardware, you can install all of the below lock without picking up a chisel.

BDGW – Superlock Surface Fixed Digital Gate Lock

The BDGW is our newest addition to the Superlock family and is a fully mechanical lock. The entire lock mechanism and keypad is made in high quality stainless steel, making it highly corrosion resistant. The BDGW comes with a gate keep, which is installed on the gate post and will receive the latchbolt.

  • Corrosion resistant – the lock features marine grade keypads and powder-coated stainless steel casing
  • No power needed – the mechanical keypad requires no power and can be installed anywhere
  • Adjustable latchbolt – the latch springs in 15 mm and can be adjusted for another 20 mm in length
  • Auto-latching – close the gate and the latchbolt latches into the gate frame. To open the gate – enter the code and turn the handle
  • Available in 2 optionsDouble-sided (keypad on both sides) or Single sided (keypad outside, lever handle inside).

Please note: This keyless combination lock for wooden gates is handed. To find out if you need the left or right handed option, follow the simple steps in this guide.

Surface fixed digital keypad lock on white timber gate
The BDGW double-sided keypad lock.
DGLW – Select Pro Surface Fixed Gate Lock

The Gatemaster DGLW Surface fixed gate lock is a product that incorporates both the keyless entry and the tolerance needed for gates. It works as both a gate latch option and also a secure method of locking a gate. Mainly used on wooden gates, the DGLW was designed as an answer to the lack of options for keyless combination lock for wooden gates. It incorporates:

  • A latch that extends up to 55mm from the face of the gate – maximum tolerance and high security!
  • Long latching movement – latch bolt projects up to 20mm into the keep which increases security
  • Simple to fit – just drill 3 holes through the gate and bolt on
  • Keep box included
  • Durable – tested to over 1,000 hours salt spray, will survive the elements
  • Auto-latching – close the gate and the latch bolt latches into the keep box
  • Available in 2 options – Double sided (keypad both sides) or Single sided (Keypad outside, lever handle inside)

Watch our tutorial on how to install the DGLW keyless combination lock for wooden gates.

Please note: The DGLW is handed. To find out if you need the left or right handed option, follow the simple steps in this guide.

Keyless combination lock on wooden gate
The DGLW with mechanical keypad and keep.
SLDS – Superlatch Digital Lock

As opposed to the BDGW and the DGLW, the Superlatch features a combination keypad on the outside of the gate, but has a latch lever handle on the inside. The latch is protected by an integrated shroud to help prevent outsiders gaining easy access.

  • No power needed – mechanical keypad lock
  • Corrosion resistant – marine grade keypad and powder-coated stainless steel latch
  • Built to accommodate the swelling of wooden gates during the wet season
  • Reversible handing – can be used on left or right hand gates
  • Auto-latching – close the gate and the latch catches onto the strike plate. To open the gate – from outside enter the code and turn the handle, from inside simply twist the latch.
  • Easy to install – install by drilling 3 holes in the gate. View the installation video here.
  • A great alternative to a standard digital lock with tubular latch

Open timber gate with digital keypad lock showing. Through the opening, is a bench on paved path and grass.
A fully mechanical keypad for keyless entry.
Light softwood garden gate with a latch handle and shroud installed.
The integrated latch and shroud.

Choose a keyless combination lock for wooden gates today. These are available through our distribution channels around the world. 

Just contact us for more information.

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New ML4 Mortice Hook Lock – Security made simple!

ML4 mortice hook lock installed in black metal mesh gate frame. Gate is standing in front of a marina with lots of boats and a boardwalk.

Mortice locks have been around for a long time, dating back to the mid-18th century at least, so it would be fair to say that it is a well-established concept, proven by time itself. No major changes can be done to that concept, right?

Not so fast…!  At Gatemaster, the idea of re-creating a centuries old design was a challenge, but it isn’t the first time we’ve turned an accepted design on its head. Our very first gate lock, in fact, was a revolutionary combination of deadlock and sashlock into one single-action bolt, and our modern-day Superlock uses that very same design.

So we thought we’d take a swing at using that same concept for a mortice hook lock.  The idea sounds simple: when you are using the lock, you only need either the latch or the deadbolt, but never both at the same time, so why are both needed?  However, in practice, a complete redesign of the inner mechanics was necessary to make it work.

What everybody wants

Our first thought when starting a new R&D project is always, will this help make anybody’s life better, easier, or simpler?  The first thing, therefore, was to go to our partners and ask them how we can do that for them.  Turns out in principle, people were looking for the equivalent of a fully functional off-roader with the footprint of a small city car.

Challenge accepted!

As mortice locks are used in a variety of applications and settings, both aesthetics and functionality matter.  Form factor, quality of the build and price were put forward as the most important aspects of the product.  However, it also had to be something unique, enabling our customers to stand out in today’s very competitive fencing and security market. So, we’re proudly introducing the mortice hook lock.

The concept

Technical drawings of the mortice hook lock and the keep that goes with it

Handing over to R&D

Our leading R&D engineer Mark Matthews was given our challenge of ‘reinventing the wheel’.  To make the idea work, the lateral movement of the latch had to be changed to a rotary movement.  This helped maintain the long latch travel to make the lock suitable for the larger tolerances needed on gates, while still fitting into a 40mm frame.

We were asked for a hook, so we went with an accepted design for sliding gates and doors, where the hook drops down and catches into the keep, preventing the gate from being forced sideways.  When unlocked, the hook acts as a latch, enabling the gate to be pushed shut and opened with the handle.

A further challenge was that a sliding gate lock does not have to be handed like a swing gate lock does.  The answer to this was to create a small angled latch on the end of the hook, which enables the lock to latch smoothly when in the latching position and is also easily reversed for left- or right-hand swing gates.

The material choice for the lock was simple: stainless steel is great when it comes to protecting a highly used component from wear-and-tear in the outside conditions.  We expect our locks to last for decades, so this was our go-to material.  For the latch tip however we went with brass, which wears less when hitting against the keep.

Mark said that “we took some unconventional turns on the project, but I am very pleased with the end result.  It is a nice little lock that has every convenience you need, in a small form factor”. 

Mortice hook lock
Keep to receive the ML4 mortice lock
Mortice hook lock installed in black gate frame. Hook latch is disengaged

Working during lockdown

Simon Napthine, Managing Director of Gatemaster says “Launching new products to the market starts with your own sales team. Therefore, I prefer to involve them early in the development stage, relying on their feedback from their experience and what they see in the field”.

Testing the new mortice hook lock was a challenge, as it was going on during the nation-wide lockdown in the UK. It takes weeks to test a lock to a 1 million openings, so when the government announced that everybody should work from home, we were in the middle of the process.

We decided to use the time wisely and continue the tests, even if it meant working from home. This way, the product could be ready by the time everybody was back to work”, Simon explains. “Luckily, the testing equipment wasn’t very large, so we managed to set it up at our homes – I had 1 machine in my kitchen!”.

One of the main questions was durability.  “Having an easy to install lock is great, but you will get nowhere if it does not last, and our sales will be the first to hear about it. So, we conducted several tests to prove why R&D were so confident about this lock.”

Small testing rig for lock sitting on wooden kitchen table

Testing during lockdown!

The result

The result of our efforts is the new ML4 Mortice Hook Lock. It is great to see that Gatemaster managed to plough through all these unexpected challenges and still managed to present an interesting product, delivering on the promise to innovate a unique concept and taking one more step towards a simple and functional gate hardware for everyone.

Take a look at the ML4 Mortice Hook Lock page here!

Looking for more information or distributor details?  Send us an email at sales(@) or give us a call on +44 (0)1243 558580.

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Giving your gates a lead with a gate tether

Gate tether installed on green metal gate with hook and eye hinges

Earlier this year, we presented our prototype gate tether at the Perimeter Protection 2020 exhibition in Nürnberg – and it was a big success! This restrainer was developed to fulfil the requirements of the DIN EN 12604 regulation to keep your gates from toppling over if the top hinge were to fail.

Unfortunately, every major storm leaves at least a few sites like this one where a gate is torn off its hinges, which often leads to severe damages and liabilities. So we went ahead and developed the Gate Restrainer, which will be there when it’s needed, but will remain (nearly) invisible otherwise.

The Gate Safe organisation recommends a gate tether as a great alternative to increase safety in the “single point of failure”, i.e. the hinges. This is following the new mandatory rule (British Standard EN 12604:2017) that requires 3 hinges on all new swing gates. Such a gate tether is visually unobtrusive and easy to install to an existing gate, however, it significantly increases the safety and helps to comply with the law.

Construction of the gate tether

We were looking to make our gate restrainers simple and functional.  You could call it the airbag for your gate: neatly tucked away, hoping that you will never need it, but there to save you from a disaster.

Gate tether with brass and rubber end stops at each end

Our gate restrainer is designed from flexible braided stainless steel wire. Just as a dog leash, it can stay hidden in your gate post and slide out when the gate moves, allowing for a 180° opening.

Thanks to its unique construction the restrainer will fit in a 13mm round hole – very unobtrusive and incredibly easy to install on site.

Materials that we used:

  • Braided stainless steel wire
  • Heavy duty stainless steel stop ends
  • Copper top ends
  • Plastic bushes to protect your gate from scratches

The security

White gate with gate tether and broken top hinge. Gate leaf has blocks with "20 kg" painted on

Given its slim appearance one might think that this restrainer is a ‘weakling’, but nothing is less true!  We have developed 2 versions to allow for a wider range of applications: the GRS-03 can handle gates of up to 260 kg and the GRS-04 can go up to 500 kg thanks to its 4 mm thick wire and the reinforced plates.

But don’t just take our word for it. We have properly tested both versions and provide full reports as below.

Braided stainless steel gate tethers in bundles ready to be pressure tested

Next to that, every restrainer is tested before shipment in accord with our strict quality control standards.

Download the GRS-03 test report (PDF)
Download the GRS-04 test report (PDF)

Better safe than sorry!

A recent article in the Fencing Observer (FOBS) magazine mentioned a case where the gate installer received a large fine for the gate that has fallen over (FOBS 108, May 2020). These are situations that we all hope to avoid!

At Gatemaster, we make products that will help gate manufacturers and installers all over the world create great products that work well and keep their customers safe and happy.

Take a look at the Gate Restrainer product page here!

Looking for more information or distributor details?  Send us an email at sales(@) or give us a call on +44 (0)1243 552066.

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Simple, yet effective: Security collar for hook and eye hinge

metal gate in front of hedge

We love to share our knowledge and experience with our customers, but we also learn a great deal from all of them. So was this blog post actually inspired by them. Following the recent thefts of farm gates around Bognor Regis, our local partners pointed out that our SCP push-fit security collar offers a great solution to prevent that problem. As those collars have been flying under the radar, we have decided to spread the word.

If you are using ‘hook and eye’ hinges, you are certainly in the majority. This hinge has always been incredibly popular in the UK amongst gate professionals because it is simple, reliable and does the job.

Unfortunately, such a simple hinge does not offer a lot of security: with a loose fit, your gate can be manoeuvred off your post with no additional tools. Every year, a few articles such as this one (Police warning after spate of farm gate thefts – FW) are published in local press, warning farmers and properties for another series of thefts.

It goes without saying that damages to your property, cattle and even just repairs can add up to significant amounts out of your wallet!

Fitting to hook and eye hinges

The remedy for this problem is the push-fit security collar. It is simply pushed on to the hook of the hinge and it serves as a cap. The collar functions similarly to a zip-tie: when pushed down, it is impossible to move it up again. Therefore, no fasteners, glues or similar is used and the collar can be installed on your hook and eye hinges in mere seconds.

As the collar comes in 12 mm, 16 mm, 19 mm and 22 mm, it can be used for most – if not all – hook and eye hinges for both new and existing installations.

The concept of the security collar

Push fit security collar on hook and eye hinge on gate
Hook and eye hinge with weld on lugs. Push fit security collar fitted on top of hinge
SCP push fit security collar in different sizes

Visit the product page here for more information or order the push-fit security collar in the UK from our distributor site Signet: Permanent Fast Fix Security Collars – Signet Locks.

If you are looking for hook and eye hinges, we also offer them here: Gate hooks & eyes – Signet Locks.

Just Contact Us if you require any further information!

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The Superhero lock for metal gates

The superlock. Picture showing a gate lock with a superhero cape on.

Although you might think that this is just a lock for metal gates, we believe our Superlock to be a real superhero!  Firstly, you’ve got its multitude of “costumes” that provide plenty of different solutions. Moreover, it is loved by all gate owners who have one of the locks installed for its reliability and clean aesthetics.

But that’s not the main reason!

We believe that the biggest advantage of it is what it can do for the gate professionals: make their life easier, save them time and money and make any job look great and professional. A real superhero that will help you out, no matter what crisis or urgent job you are dealing with.

That’s why we have made a dedicated page for our Superlock containing all the most important information. Like how easy it is to install; the different types of locks included in the range; and of course all the technical details and specifications your heart desires.

If you are keen on finding out more, visit the product highlight page through the following link for the full The Superlock RangeWithin the range, we have latch deadlocks, quick exits and digital code lock for metal gates as well as secure keeps to help prevent people prying the gate open.

You are always more than welcome to give us a call  +44 (0)1243 552066 or send an email to and we’ll gladly discuss all things Superlock with you!

Now Stainless!

The Superlock is now made in stainless steel – inside and out.

Read more about the changes to stainless steel here.

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Case Study – Self-closing gates, Manor Place Depot, London

Timber clad metal gate with self-closing gas strut, lights and branch in foreground


Manor Place Depot, London

Self-closing gate solutions for external gates in residential areas can be a challenge, due to outdoor environment and potential vandalism. Bellsure chose the Gatemaster gas strut closer for their cycle shelters in a prestigious development in the heart of London.

The Project

Our client Bellsure was asked to supply a cycle storage scheme in Manor Place Depot, a residential development part of a multi billion pound regeneration scheme in Elephant & Castle.

The bespoke shelters that Bellsure designed were solidly constructed from steel and clad in timber. The gates were therefore robust but also a reasonable weight.

Bellsure chose an electro-magnetic lock as the locking device for this project. The client was also looking to fit a self-closing gate device to ensure they always closed and secured themselves. In addition, they needed a solution that would close slowly to prevent the gates causing any disturbance.

The Self-closing Gatemaster Solution

In order to solve the clients concerns, we suggested a screw-fixed gas strut closer. This is a hydraulically dampened gas strut that ensures a gentle close and is very easy to fit to metal or wooden gates. This suited their specifications for the following reasons:

Easily retro-fitted: The gas strut closers were required to be fitted after installation.

Slow closing: The unique oil dampening within the gas strut ensures the gate closes safely and doesn’t bang shut.

Unobtrusive: The slimline strut blended in well with the cladded gates.

We regularly install the Gatemaster gas struts on our shelters and they have proven to be good quality and reliable. A lot of the shelters we install are steel framed clad with timber which makes the gates heavy, and the Gatemaster closer works well with no issues.

It was a good retrofit solution for our Manor Place Depot install, the gas struts fitted well with the doors and were easy to install with the screw on brackets. Overall a good install for us and the client was pleased with the end result.

Murray Tennent, Bellsure

Wooden bicycle shelter with flowers on roof and light attached to side. On door is a self-closer.

GSBW Gas Strut Closer

The GSB Gas strut closer with ball end joints and surface fixable brackets.


Interested in this product?  We’re always happy to talk about your projects, just send us an email or phone us on +44 (0)1243 558580.

You can also follow this link for a free pdf download of this case study.

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The Innovative Bolt-on Hydraulic Gate Closer

hydraulic gate closer disassembled

Are you in search of an adjustable, adaptable gate closing solution for metal or wooden gates? Then our new hydraulic gate closer might be just what you’re looking for!

Our new gate closer

The all-new APSW bolt-on hydraulic gate closer is a new and improved version of the well-known APS closer, one of the most reliable and sturdy gate closers on the market.

Unlike its predecessor, the APSW can now be bolted onto the gate. This eliminates the need for welding and fitting it will be an easy task for either the gate manufacturer or the gate installer.

Gate manufacturers:

The APSW self-closing hinge kit is the way to go for both metal and wooden gates. Above all, the gates can be prepared to take the brackets in the workshop and the closer installed on site, which removes the need for any welding.

Fencing & Gate install only:

The APSW gate closer is easy to fit on site as all you need to do is drill and tap the appropriate holes on metal gates or screw onto wooden gates. The manufacturer doesn’t have to prepare the gate beforehand unless they specifically choose to do so.

This hydraulic gate closer boasts several features:

  • Robust closer unit – A long-lasting solution, that discourages vandalism
  • Heavy duty – designed for gates up to 150kg
  • Meets ROSPA recommendations
  • 2 speed adjustable – latching and closing speed adjustable for easy configuring
  • No power required and maintenance free
  • Stop hinge prevents the gate opening wider than 100 degrees

The kit includes a bottom closer unit and a top hinge set. In addition, the kit comes with metal gate fittings as well; the installer would need to supply fixings for wooden gates.


We are often asked if this closer can be retrofitted after the gate is installed. Unfortunately, it cannot work with any existing hinge configuration as the pivot point has to be aligned top and bottom.  However, the closer is absolutely suitable for retrofitting if the existing hinges can be removed.

Please note – this product is designed to be fitted by professional gate manufacturers or installers.

View the product here

Want to find out more?  Contact us for more information!

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Perimeter Protection 2020

Perimeter Protection logo

Gatemaster are looking forward to attending Perimeter Protection in January 2020, in Nuremberg, Germany.

We’re excited to introduce a range of new products and show our proven existing ranges at the Perimeter Protection exhibition. We love our customers getting hands-on with the products and it’s great to network with others in the fencing market.

We’re steadily increasing our reach in Europe through distributors. We work directly with the top fencing manufacturers to bring our world-class range of simple and easy fit products to global markets.

We’d love to meet you there!  If you’re planning to attend Perimeter Protection 2020, contact us. We will be on stand 12-409 to find out more about your company and how Gatemaster could help you.

If you haven’t already booked but would like to attend, we have a number of free invitation slips. Just send us an email with your address details and we will get one posted.

Toby Roberts-Davies and Ivan Arusev will both be attending, as well as others from our team. If you want to get in touch with them directly just follow the link to their LinkedIn profiles or email them using the email addresses below.

Toby Roberts-Davies – toby.rd(at)
Ivan Arusev – ivan.a(at)

We look forward to seeing you there!

The Gatemaster Team