... Electroplated Diamond Grinding Wheel Coating width : 16/18/20/25mmCore thickness :0.6/0.8/1.0mm Bore size:20/15mm Features:1,Smooth cutting ... surface,high cutting speed.2,Coating:nickel,titanium available.3,Ripple cup ... romoval and grinding4,They are most efficient tools for fast grinding,rough deburring, smooth shaping and finishing of concrete ,stone, ...