The Definitive Guide to RCM - Rotating Constant Method of Master Keying

March 3, 2015

Locksmithing Education, LLC announces the release of The Definitive Guide to Rotating Constant Method (RCM) Master Keying, written by recognized industry master keying expert Don OShall. 

This book is the definitive guide to one of the industry's least understood tools - the Rotating Constant Method of master key system design. Written in easy to read language, it makes this previously often misunderstood technique very clear. It covers many techniques generally unknown in the industry. RCM, while quite simple once you fully understand it, is still often considered an advanced technique. This book is your absolute best way to learn it!

The book includes techniques such as the "Defined By" label, and subsets such as the Limited Position Progression and Limited Rotating Constant, as well as "Pure" RCM for five pin, six pin or seven pin cylinders or cores.

This valuable training and reference manual is sold by select Locksmith Distributors and through both the ALOA and ILA online bookstores, as well as online from the publisher.