A powerful choice for drilling, honing, reaming, and hole sawing, this drill has extra advantages. The reversible motor lets you drive and remove screws too. Even the tightest screws back out with ease under the force of the 1/2 hp motor. Quick reverse lever. Variable speed thottle. Heavy duty ball and needle bearing. More power and long tool life. Planetary gear reduction balances the load. Specification: Free Speed: 400 rpm Chuck Size: 1/2" (13 mm) Rated Power: .5 hp (.38 kW) Net Weight: 3.3 lbs. (1.50 kg) Overall Length: 8.7" (221 mm) Avg. Air Consumption: 1 cfm Air Consumption @ Load: 27 cfm Sound (pressure/power): 84/105.9 dBA Air Inlet: 1/4" Minimum Hose Size: 3/8" (10 mm)