Die cast aluminum; Light weight; Ball bearing; Muffled handle exhaust allows for more efficient, quiet operations; Low vibration design, 6-planetary-gear configuration; Reversible drill with variable speed trigger for precise speed control; Features: Free Speed: 700 RPM; Air inlet: 1/4" NPT; Air Consumption: 4.0 CFM; Air Working Pressure: 90 PSI; Chuck Capacity: 1/2"; Speed reducer: 6-Planetary-Gear; Exhaust: Handle; Weight: 4LBS; Nose Level: 98 Dba; Forward & Reversible. Include: 1pc--------1/2in Air Drill 1set-------handle 1pc-------chuck key 1pc-------connector 1pc-------empty oil can