duMONT Minute Man® Broach Sets offer the most popular combinations of Keyway Broaches and Bushings in attractive wooden cases. A Bushing guides and supports the Broach as it passes through the workpiece. The Bushing size and Style are determined by the bore diameter of the workpiece as well as the Style of Broach to be used. “A” Style Broaches are used with “A” Style Bushings, “B” Style Broaches with “B” Style Bushings, etc. duMONT Collared Bushings are “A”, “B”, “B-1” and “C” Style while “D” and “E” Style Bushings are Plain. Individual Minute Man® Bushings are available from stock in a wider range of additional American Standard (1/4″-3″) and Metric (6mm-72mm) sizes. These may be used to enhance the range and combinations of an existing Broach Set or to replace damaged or missing Bushings original to the set.