Introduction

If you've ever needed a replacement multipoint locking mechanism, you've probably discovered there isn't just one type of door lock.

Over the years, dozens of manufacturers have produced multipoint locking systems for uPVC, composite, timber, aluminium and French doors. Some continue to manufacture new locking systems today, while others have discontinued older designs or become part of larger companies.

Understanding who made your locking mechanism is an important first step when identifying replacement parts, but it is only part of the process. Most manufacturers have produced many different locking mechanisms, often with different gearboxes, backsets, handle centres and locking point configurations.

This A–Z guide introduces the most commonly encountered multipoint lock manufacturers and explains why correct identification involves much more than simply reading the name stamped on the faceplate.

Why the Manufacturer Matters

Knowing the manufacturer helps identify:

• Replacement gearboxes
• Complete locking mechanisms
• Compatible replacement parts
• Security upgrades
• Suitable keeps
• Replacement accessories

However, the brand name alone is rarely enough to identify the correct replacement.

Measurements and mechanism design are equally important.

Common Multipoint Lock Manufacturers

Some of the manufacturers most frequently encountered by locksmiths include:

• Avocet
• Coldseal
• ERA
• Fullex
• Fuhr
• GU
• KFV
• Lockmaster
• Maco
• Millenco
• Paddock
• PERA
• Roto
• Safeware
• Securistyle
• Sobinco
• Winkhaus
• Yale

A

Avocet

Known for producing multipoint locking mechanisms, Euro cylinders and residential security hardware.

Many Avocet locks remain in service throughout the UK.

 

AGB

Known for

Italian manufacturer producing multipoint locking systems, hinges and door hardware.

Commonly Found On

• Composite doors
• Aluminium doors
• Premium European door systems

C

Coldseal

Often found on older uPVC doors.

Several different locking mechanism designs were produced over the years.

E

ERA

Produces a wide range of residential locking systems, multipoint locks and security hardware for uPVC and composite doors.

F

Fullex

One of the UK's best-known manufacturers of multipoint locking systems.

Found on many residential entrance doors.

Fuhr

A German manufacturer producing premium multipoint locking systems for residential and commercial applications.

Particularly well known for automatic locking mechanisms.

G

GU (Gretsch-Unitas)

One of Europe's largest manufacturers of multipoint locking systems.

Produces mechanisms for:

• uPVC doors
• Composite doors
• Timber doors
• Aluminium doors

 

G

Garrison

Known for

Older multipoint locking mechanisms found on some uPVC entrance doors.

Commonly Found On

• Older residential properties
• Replacement installations

K

KFV

German manufacturer specialising in high-quality multipoint locking systems.

Well known for automatic locking technology.

L

Lockmaster

Commonly fitted to composite and uPVC entrance doors throughout the UK.

Replacement parts remain widely available.

M

Maco

Produces both window hardware and multipoint locking systems used by many door manufacturers.

Millenco

Well known for replacement gearboxes, complete locking mechanisms and door hardware.

Often provides replacement solutions for obsolete systems.

 

M

Mila

Known for

Produces multipoint locking systems, door hardware and window hardware for residential doors.

Commonly Found On

• uPVC doors
• Composite doors

P

Paddock

Long-established manufacturer supplying multipoint locking systems and replacement components.

PERA

Found on a variety of older uPVC door installations and replacement mechanisms.

R

Roto

Major European manufacturer of window and door hardware.

Produces a wide range of multipoint locking systems for residential and commercial doors.

S

Safeware

Used on various residential locking systems, particularly older installations.

Securistyle

Produced many multipoint locking mechanisms fitted throughout the UK housing market.

Sobinco

Belgian manufacturer producing locking systems for aluminium, composite and uPVC doors.

 

S

Siegenia

Known for

German manufacturer of premium window and door hardware including multipoint locking systems.

Commonly Found On

• Premium uPVC doors
• Timber doors
• Aluminium systems

W

Winkhaus

One of the most commonly encountered manufacturers of multipoint locking systems in the UK.

Produces:

• Gearboxes
• Complete locking mechanisms
• Automatic locks
• Security hardware

Y

Yale

Produces multipoint locking systems alongside Euro cylinders, nightlatches and other residential security products.

Why Two Winkhaus Locks May Be Different

Many homeowners believe that once they know the manufacturer, identifying replacement parts becomes straightforward.

Unfortunately, that is rarely the case.

For example, Winkhaus has produced numerous locking systems over the years with different:

• Backsets
• Handle centres (PZ)
• Faceplate widths
• Locking point layouts
• Gearboxes
• Overall mechanism lengths

The same applies to most manufacturers.

Two mechanisms carrying the same brand name may not share a single interchangeable component.

Some Manufacturers No Longer Produce Older Mechanisms

Many older locking mechanisms have now been discontinued.

Fortunately, this does not automatically mean replacing the entire door.

Depending on the mechanism, it may be possible to:

• Replace only the gearbox
• Fit a compatible replacement mechanism
• Upgrade to a newer design
• Source genuine old-stock parts

Experience plays an important role in identifying the best solution.

Identification Is About More Than the Brand

A professional locksmith will usually check:

• Manufacturer
• Door age
• Backset
• Handle centres (PZ)
• Faceplate width
• Overall mechanism length
• Locking point positions
• Gearbox design
• Follower size

Only after these measurements have been confirmed should replacement parts be ordered.

The Correct Part Prevents Repeat Repairs

Ordering a replacement mechanism based only on appearance or manufacturer often leads to problems.

The wrong mechanism may:

• Not fit correctly
• Prevent the handles from operating properly
• Leave locking points misaligned
• Require unnecessary modifications

Correct identification saves time, money and repeat repairs.

 

Where to Find the Manufacturer

The manufacturer's name is often stamped onto the faceplate that runs down the edge of the door. It may also appear on:

• The gearbox
• The locking hooks
• The latch
• The keep plates
• The original documentation

In some cases the manufacturer's name may no longer be visible, making accurate measurements essential when identifying replacement parts.

Related Complete Guides

Related Complete Guides

Continue learning with these detailed guides covering multipoint locks, door hardware and replacement parts.

Complete Guide to Multipoint Locking Systems

Understand how modern multipoint locks work, the components they contain and the most common causes of failure.

Complete Guide to Door Components & Hardware

Learn about the individual components that make up a modern entrance door and how they work together.

Complete Guide to Door Locks

Discover the different types of locks fitted to modern homes and understand their operation.

Complete Guide to Euro Cylinder Door Locks

Find out how Euro cylinders work with multipoint locking systems and why choosing the correct cylinder matters.

Complete Guide to uPVC & Composite Door Handles

Learn how handles interact with the gearbox and why matching the correct PZ centres and measurements is essential.

Complete Guide to Door Alignment & Lock Performance

Understand why poor alignment causes premature wear on gearboxes, locking points and handles.

Conclusion

Although many multipoint locking mechanisms appear almost identical from the outside, small differences in dimensions, gearbox design, locking points and operating methods can make them completely incompatible. Correct identification involves much more than recognising the manufacturer's name.

Understanding the manufacturers most commonly found on uPVC, composite, timber and aluminium doors helps homeowners communicate more effectively with locksmiths and appreciate why accurate measurements are essential before replacement parts are ordered. Whether your locking mechanism is current, discontinued or difficult to identify, careful diagnosis remains the key to a successful and long-lasting repair.