Extra heavy duty drill for extra heavy duty work with side handle. One hand reverse lever for reversible action with positive action trigger for speed control. Variable speed throttle for ease of starting drill hole. Built-in muffler reduces noise level. Planetary gear system for long life 1 year warranty on material and workmanship. Specifications: . 1/4 capacity Jacobs chuck. Free speed; 500 RPM. Overall length: 9-1/4. Net weight: 4-1/3 lbs.. Motor size: 1/2 HP. Air inlet thread size: 1/4 NPT. Air hose I.D. size: 3/8. Avg. air consumption: 7 cfm. Noise level: 88.3 dBA @ 90 PSI