3M Polyimide Hybrid Bond Diamond Wheels and Tools, 11V9, 3-3/4X1-1/2X1-1/4, X=1/8 D320 686HN, U=3/8 - MMMPBDW41198

3M™ Diamond Wheel 686HN is a special hybrid bond diamond wheel used for grinding primary and secondary relief angles on round tools made of tungsten carbide. This highly engineered wheel offers the excellent form retention and long wheel life which is ideal for long production runs where tighter control on tolerances are required.