Ideal for locksmiths and distributor service personnel who must service a variety of Corbin Russwin keying systems.  Also for end users with Pre-System 70 keying systems.  Contains all pins required to combinate standard, IC and master ring cylinders. Accommodates System 70 and non-System 70 for both plug diameters and all key classes. Furnished in a reinforced steel case with combinating instructions on the inside of the lid. A separate, removable, two-sided chart contains pin lengths for all modern key classes. Includes tweezers and both diameter plug followers.