Here's the economical choice for power, a high quality air drill designed for drilling, hole sawing, cylinder honing, and any other job that calls for a 1/2" size. Its quality features for long life, include the industrial grade 1/2" chuck, ball and needle bearing construction, and double reduction planetary gearing. No load speed of 500 rpm. Auxiliary side handle. Specifications: Free Speed: 500 rpm Chuck SIze: 1/2" (13 mm) Rated Power: .5 hp (.38 kW) Net Weight: 3.2 lbs. (1.45 kg) Overall Length: 9" (229 mm) Avg. Air Consumption: 4 cfm Air Consumption @ Load: 21 cfm Sound (pressure/power): 84/101.8 dBA Air Inlet: 1/4" Minimum Hose Size: 3/8" (10 mm)