Teasing throttle for precise control. Handle exhaust reduces noise and directs air away from operator and workplace. Needle bearing gearing for improved durability. Oil free operation. Applications: heavy drilling, reaming, hole sawing and jobs requiring a lot of torque Chuck size: 1/2"; spindle size: 3/8-24; free speed: 500 RPM; average air consumption: 7.5 cfm; air inlet thread: 1/4" NPTF; minimum hose size: 3/8"; sound dBA: 96; length: 8"; weight: 3.25 lbs.