Where Mul-T-Lock began: the 4 way lock.
Mul-T-Lock's first high security lock was the patented 4 way lock, which quickly spread into other countries and led to the development of a new range of security products. These multi point locks offer extra protection that can transform any standard door.
The models
Mul-T-Lock 4-Way lock model 235
Installed inside wood or metal doors to provide a maximum 4 way multi bolt locking solution. Operates with a Mul-T-Lock Euro cylinder and cogwheel 360 key turn for maximum deadbolt action.
Mul-T-Lock 4-Way lock model 231 and 232
Can be installed inside wood or metal doors to provide a maximum 4 way multi bolt locking solution. This small size 4 way lock is designed to be concealed inside the door. Left hand model 231, right hand model 232.
Mul-T-Lock 4-Way lock model 250
Installed inside wood or metal doors to provide a maximum 4 way multi bolt locking solution. Model 250 is without the lock latch, operating with a Mul-T-Lock Euro cylinder and cogwheel 360 key turn.
Mul-T-Lock 3-Way lock model MPL 415G
A heavy duty security lock installed inside metal doors to provide maximum protection. Operates with a Mul-T-Lock Euro cylinder allowing smart operation of four key turns for maximum deadbolt action.
Good to know
World leading in security innovations
Mul-T-Lock developed a range of high security cylinders offering the patented telescopic pin tumbler mechanism for maximum security and durability, demonstrating over 45 years of world leading innovation through research and development.
Catalogue pages and brochures
Who needs Mul-T-Lock multi-point locks?
Mul-T-Lock multi-point locks suit doors that need more than one bolt. They are installed inside the door and throw bolts in several directions, so the door is held at more than one point.
Frequently asked questions
What is the difference between the 4-way locks and the MPL415G?
The 4-way locks (231, 232 and 235) are installed inside wood or metal doors and throw bolts in up to four directions. The MPL415G is a heavy-duty lock for metal doors, with up to 14 locking bolts.
Which cylinder do they use?
They operate with a Mul-T-Lock Euro cylinder. The 4-way lock 235 uses a CogWheel cam.
Is there matching door hardware?
Yes. The SH300 security door hardware suits the 4-way lock 235. It has fixed or moving handles, suits doors 45 to 70 mm thick, and has a stainless steel cylinder protector.
Need a key for your Mul-T-Lock multi-point locks?
We are an authorised Mul-T-Lock distributor, we can support your restricted keys or master key systems.
The Mul-T-Lock name, the muscleman logo, in the field of locking products, the MTL name, and any other name, mark, or logo used by Mul-T-Lock and marked by a ™ or ® sign, are registered / pending or otherwise owned trademarks of Mul-T-Lock Ltd. and/or its affiliates 2026 © ASSA ABLOY
