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Keys to Understanding Tubular Locks Keys to Understanding Tubular Locks Book 40 pages Illustrated 5 1/2" x 8 1/2" Softcover For the first time, a manual on the 3 most popular tubular locks that are used on vending machines, coin operated washers & dryers, coin changers and burglar alarms. Internal construction is fully covered as well as how to open the locks by drilling and by impressioning. |