power tools,pneumatic tools Free Speed :65,000RPM Collet Size: 3MM ... *17mm Micro Air Grinder MSG-3BSN /Air Toolspower tools,pneumatic toolsTechnical parameter:Free Speed : 65,000RPMCollet Size ... applied in varieties moulds, hardware products, glass, crafts, accessories, circuit board extensively such as shoe mould, wheel mould ... .Ask professional staff to maintain the tools. power tools,pneumatic tools