The following Glossary of Locksmith Terminology is provided courtesy of the Master Locksmith Association (MLA). Click on a letter below to be taken to its corresponding terms.

Ear of Key or shoulder - The projecting stop on one or both edges of a pin tumbler or other key near the bow to prevent the key from being pushed too far into the lock.



Easy action - A lock is designed so that only light spring pressure is required to move the bolt; additional spring pressure is required to move the follower and lock furniture. This is necessary especially when lock furniture comprises of lever handles, the handles then return to their correct position.

En suite - To indicate that locks are incorporated in a master keyed system or keyed alike en-suite.

Escutcheon - The cover for the keyhole of a mortice or similar lock.

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