4" Resin Bond Diamond XtraFine Cups

The 4" Diamond ExtraFine Cutter Cups grind faster than conventional silicon carbide cutter cups. The Resin Diamond Cutter Cups accommodate spheres from 3-3/4" to 6-1/2". The Resin Bonded Diamond Cutter Cups provide better control and grind quickly. These are designed for finishing spheres. All cutter cups come with 3/4" National Pipe Thread. EXTRA FINE, BLUE RESIN 1200G.