M7-QA210A | M7 Die Grinder 20000rpm 190mm Long Quick Release Chuck 6mm C 6mm Collet Features Quick release collet. Metal front cap. Safety lever throttle Specifications Collet Size: 6mm Free Speed: 20000 RPM Air Requirements: 10 CFM / 90 PSI Inlet: 1/4 Overall Length: 190mm Rated Power:0.9HP Net Weight: 0.65kg Sound Pressure: 75.7 dBA Vibration Level: 0.8m/s²