Common Master Keying Book | The National Locksmith

Description

Professional-grade reference covering master key system design, implementation, and servicing. Details key bitting calculations, cross-keying methods, and master key system architectures for commercial and institutional applications.

Includes practical examples for 5-pin, 6-pin, and 7-pin systems with step-by-step procedures for creating master key schedules and avoiding common vulnerabilities. Essential for commercial locksmiths. 184 pages, spiral bound.