Turbo diamond grinding wheel 1.Size:4",4.5",5",7",9'',10'' 2.for rough medium fine floor ... 3.High efficiency and durable Turbo diamond grinding wheel 1.Size:4 ... ",4.5",5",7",9'',10'' 2.for rough medium fine ... arranged segments are brazed on the cup wheel used for fast grinding concrete surface and floor. Big holes provide ...