Specification: 1.ST0201-D Flexible Metal Copper Resin Pads 2.size:4",5" 3.50/100/200/400# ... stone sharpeners, diamond electroplated cutting discs, diamond grinding discs, diamond resin grinding wheels, etc. 2. Workshop 2: tungsten carbide burrs: inch ... tools to Japan, Germany, the USA and Australia Flexible Metal Copper Resin Pads size:4",5"