Metal Boned and Sintered Diamond Wheels was a Professional Grade Wheels for Vertical Cabbing Machines,It has a Full mm deep diamond matrix exposes new cutting points as the wheels are used.Sintered wheels can be dressed to expose additional crystals for a more aggressive cut, but dressing is not always needed if you follow a "side to side" pattern when grinding to ensure even wear. Dynamic balancing at the factory ensures concentricity for smooth and quiet grinding.Generally order one grit size larger for sintered diamond tools as compared to plated or brazed parts.It has a 1" arbor comes withReducing Bushing Adapters to adapt to 1/2, 5/8 or 3/4 inch shafts. Available in a variety of grits and sizes.