The Neiko Tools Mini Angle Die Grinder is a 20,000 RPM free speed pistol grip die grinder with a 1/4" collet that accepts a variety of heads for a variety of purposes from automotive to light maintenance, including: weld prep, grinding, polishing, deburring, gasket removal and more. This air grinder uses a standard 1/4-inch NPT air inlet and 3/8" (ID) hose, so it can be powered by a common air compressor found in home garages and automotive shops alike. The grinder houses a powerful but efficient motor that has a 20,000 RPM free speed and only needs 2.1 CFM at 90 PSI. The compact right angle design allows for flexibility in tight spaces and the light weight (1lb 3oz) reduces user fatigue. This miniature pneumatic die grinder is designed to be very controllable. A built-in air regulator can be adjusted with a flathead screwdriver or one of the included wrenches. The paddle lever throttle and precision gearing allow for detailed feathering control. The rear exhaust air flow system directs air away from work surface for delicate jobs. The durable composite housing reduces the effects of chill and vibration. The self-locking throttle lever prevents accidental starting of motor. SPECIFICATIONS: Collet Size: 1/4" Free Speed: 20,000 RPM Air Consumption: 2.1 CFM Air Pressure: 90 PSI Inlet Size: 1/4" NPT Hose Size (ID): 3/8" Includes 19mm (3/4") and 14mm (9/16") Wrench