Pistol style air drill for easy operation that is suitable for both left and right handed useSimple to use with a thumb switch lever for switching between forward and reverse. Free Speed: 450 rpmQuick change chuck mechanism for easier changing of drill bits. Chuck Size: 13mmErgonomically designed handle for better grip. Total Length: 9.82 inchesComposite grip protects and insulates against vibration and cold air. Vibration: 1.93 m/s squared. Sound Level: 88.8 dB.