Chicago Pneumatic 785 3/8" RediPower Non-Reversible Air Drill. This versatile air tool will handle a variety of jobs such as accessory and air conditioner installation, engine work and auto body repair. Powerful 1/2 hp air motor resists stalls and conserves energy. Triple idler planetary gearing for smooth operation and extended tool life. Teasing throttle provides precise control from start-up thru run-down. Handle exhaust reduces noise for quiet operation. Ergonomic handle design for operator comfort. Specifications: jacobs chuck size - 3/8", motor - 1/2 hp, spindle thread - 3/8"-24, free speed - 2400 rpm, cfm - 3, hose size - 5/16". Includes: jacobs 3/8" drill chuck.