Pencil Grinder Medium Duty Horsepower 0.1 hp Collet Size 1/8 in Exhaust Location Rear Max Speed 56 000 RPM Collet Guard Type None Air Inlet 1/4 in NPT Female Air Inlet Connection Size 1/4 in Air Inlet Gender Female Air Inlet Type NPT Kit Contents (1) Bare Tool Whip Hose I.D. 5.5 mm Head Type Standard Head Lock-Off Switch Yes Lock-On Switch Yes Brake Type None Anti-Kickback Clutch Type None Anti-Restart Technology Yes Dust Management None Vibration Level 2.4 m/sq sec