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.