The Encyclopaedia for Locksmiths

A Must have for all Locksmiths, trainee Locksmiths, and security personnel. It contains standard definitions and terms so that we can all sing from the same song sheet!

This is an updated version of the original by Frank Butter, inventor of the 'Butter's' System locks.

Author: Mick Friend

Important Notice! Under no circumstances can books be returned once supplied.