Neiko 30098A Composite Reversible 1/2" Air Drill with Keyless Chuck and Handle, 90 PSI High quality rotor and bearings with a convenient 3/8-inch no key chuck feature changes bits quickly during high speed drillings without manual tightening hassle Built-in noise control mufflers in rear handle exhaust is connected to air compressors producing low noise output limiting distraction for better concentration Ergonomic designed rubber pistol grip reduces effects of chill and vibration with a side handle for exceptional control and maximum comfort Comfortable one finger touch side-mounted forward/reverse switch makes directional changes smooth and easy Lightweight, composite housing design is easy to hold and withstands heavy duty action with speed up to 450 RPM at 4 CFM air consumption