4" Sintered Diamond Coarse Cups

The 4" Diamond Coarse Cutter Cups grind faster than conventional silicon carbide cutter cups. The Sintered Diamond Cutter Cups are aggressive without being harsh and accommodate spheres from 3-3/4" to 6-1/2". All cutter cups come with 3/4" National Pipe Thread. COARSE, RED SINTERED 40/50G