Keys to Understanding Tubular Locks

Softcover, 51/2x81/2, 40 pages, illus.
$13.95
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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.