This diamond grinding head has radius corner rounding edge, which is forming Marble Granite Quartz Stone. Wet and dry both can be used. New vacuumer brazed technic provide much better performance. Radius 10mm, 12.7mm(1/2") shank, diamond grit: #60.For stone edge profiling/cutting, marble & granite , quartz stone, artificial stone. Kemei produces all types of grinding heads, including aluminum oxide grinding head, pink rotary tools, diamond grinding heads, polishing mouted point, and all shapes of grinding stones. Except diamond grinding wheels, we also produce aluminum oxide grinding wheels, silicon carbide grinding wheels, knife grinding wheel, bench grinding wheel, vitrified grinding wheels. They can made in ceramic bond, or resin bond. If you need any types of normal abrasive grinding wheels, cont…