Cutter Cups - Diamond Grit:100 The lap plate's surface is

The lap plate's surface is machined flat to a very close tolerance

* Maximum diamond concentration

and 600 grits

Hard Pine Wood Construction: Durable and resilient

Cutter Cups - Diamond Grit:100 The lap plate's surface isRESIN BOND: 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 and are sold individually. SINTERED: 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 and are sold individually.