M1 Series Mortise Lock
ANSI Grade 1 Extra Heavy Duty
An optional clutch operation function is available for the outside trim. When locked, the door handle will disengage from the mortise lock’s mechanism and turn freely, preventing damage of the lock if an excessive force is applied on the handle and protecting your lock from forced-entry attempts.
Enhance your door lock security with this feature and feel at ease knowing that your door is even more secure than before.
Cylinder to spindle center is 3-5/8″ (92mm) which enables retrofit in most manufacturers’ mortise locks.
Varied sectional and escutcheon trim options available to meet different needs and preferences.
High-precision standard or I/C cylinders offer high security and reliability.
Solid brass or pressure zinc cast lever retained by knob keeper, outside lever cannot be removed from outside.
Spring cassette design enhances protection against lever sagging, providing a firm and positive horizontal lever return position.
Spindle designed to break when an excessive force is applied, thus protecting the lock case from further damage.
Working parts are made of high-strength steel alloy.
Solid one-piece latchbolt made of stainless steel. The anti-friction curve design provides enhanced life cycle with reduced wear to the strike, adding strength and security.