3M(TM) Diamond Polyimide Bond Cutoff Wheel 1A8, 6 in x .035 in 1-1/4 in, Solid Diamond, CGD120 S100 BP, 1 per case Diamond particles in a polyimide bond matrix offer high cut rates, excellent abrasive life and temperature resistance in cutoff wheels in cnc cutting applications, of carbide & non-ferrous materials.