● Built-in governor mechanism controls rotation speed for safety. The handle can be mounted from either the left or right depending on the work. No-load rotational speed (rpm): 12,000; Air consumption: 0.6; Hose inlet: NPT1/4; Exhaust: Bottom right; Total length: 9.0 inches (229 mm); Applicable grindstone dimensions: outer diameter x thickness x inner diameter: 3.9 x 0.6 inches (100 x 6 x 15 mm); Weight: 3.7 lbs (1.7 kg); Air pressure: 0.62 MPa; Tip tool: 0 lbs (1.7 kg). Whetstone: Exhaust Direction. : Bottom right; Switch: Lever type; Uses: For metal grinding, rust removal, and bead removal.