Master Key Systems and Keying Flashcards

When re-keying a lock to a master key system, what additional component must be added to each pin chamber to create the master key functionality?

Answer: A master wafer (master pin) placed between the key pin and driver pin

A master wafer is inserted between the key pin and driver pin, creating a second shear line that allows the master key's bitting to also operate the lock.

What is 'pinning to the bitting' vs. 'pinning to the code' in lock re-keying?

Answer: Pinning to the bitting uses an existing key to determine pin heights; pinning to the code uses the key's numerical code from a code book or database

Pinning to the bitting measures an existing key's cuts to determine pin heights, while pinning to the code looks up the numerical key code and selects pins based on the depth table.

Which ALOA designation specifically recognizes a locksmith's proficiency in keying systems and master key hierarchy design?

Answer: Certified Master Locksmith (CML)

The Certified Master Locksmith (CML) is ALOA's highest designation, requiring demonstrated competency in all areas including master key systems, institutional keying, and advanced lock servicing.

What is a 'key system record' and why is it a critical document for a master key system?

Answer: A comprehensive document listing all locks, their bitting, key assignments, and key holders — essential for managing, expanding, or re-keying the system

The key system record documents every lock's bitting, which keys operate it, and who holds each key — without it, expanding or troubleshooting the system is nearly impossible.

What does 'keying different' (KD) mean?

Answer: Each lock in a group operates with its own unique key and no others in the group

Keying different means each lock has a unique change key that operates no other lock, providing maximum individual security while still allowing a master key to operate all.

Which ALOA resource provides locksmiths with standardized keying terminology, system design guidelines, and key system documentation standards?

Answer: ALOA's Keying Systems and Masterkeying textbook and associated courseware

ALOA offers dedicated keying systems training materials and courses covering terminology, hierarchy design, bitting specifications, and documentation standards for professional locksmiths.