With its industrial grade 3/8" chuck, this economical choice includes high quality features for general drilling and hole sawing jobs. The planetary gear reduction balances the load on bearings and gears for increased tool life. Variable speed throttle. Lightweight, compact drill. Handles smoothly. Specifications: Free Speed: 2,500 rpm Chuck Size: 3/8" (10 mm) Rated Power: .5 hp (.38 kW) Net Weight: 2.4 lbs. (1.09 kg) Overall Length: 7.8" (198 mm) Avg. Air Consumption: 4 cfm Air Consumption @load: 20 cfm Sound (pressure/power):84/103.1 dBA Air Inlet: 1/4" Minimum Hose Size: 3/8" (10 mm)