"Ideal tool for chipping, breaking and digging operations. Innovative pneumatic compression system automatically adjusts air in cylinder to minimize power loss. Impact Energy ft. lbs. 18.4, Impact Energy J 25, Overall Length in. 31 3/4, Accepts Bits in. 1 1/8 Hex, Amps 13.5. Patented idling mechanism reduces hammering while at idle Anti-vibration main handle reduces operator fatigue Side handle swivels 360 for comfort and control Bits are not included Automatic brush cut-out system Model HM1500B"