A Training Course for the Beginning LocksmithHere is your chance to learn locksmithing for less than the cost of a carton of cigarettes! Covers subjects such as Tools and Supplies, Pins, Key Duplicating, How a Pin Cylinder Lock Works, Lock Picks, Pick Guns and Snaps, How To Fit Keys By Impression, Fitting Keys By Reading Locks, Master Keying, List of Suppliers and more. 81/2"x11", 47 pgs, softcvr.