Unit Locks - The King of Locks (Trade Training Manual) Dean Nickel (Author) Price: $75 (plus shipping and handling) In Stock. Ships from New Jersey when purchased from Lounging Lizard Publishing, LLC. Frequently bought together This Item (Unit Locks - The King of Locks) Master Keying - By The Numbers by Billy B. Edwards Jr Master Keying Textbook Third Edition Editorial Comments This is an excellent book for servicing these locks, which are extra heavy duty. They offer a long usable life, but when they need service, you need the information to do it right. This author learned to appreciate and even love the unit lock during his days as an Institutional Locksmith. In this book he shares many of the secrets he learned, as well as the extensive research he has done with Corbin-Russwin's help. On a scale of 1 to 5 stars with 1 being Not Recommended" and 5 being "Buy NOW!", my opinion puts this at 4.5 stars.

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