Innovative pneumatic compression system automatically adjusts air in the cylinder to minimize power loss and deliver unmatched power-to-weight ratioSpecial idling mechanism (patented) reduces hammering while idlingRubber-ringed brush holder cushions vibrations and lengthens life of brushes and armatureAutomatic brush cut-out systemSide handle swivels 360° for operator comfort and controlAnti-vibration main handle markedly reduced operator fatiguePowerful 13.5 AMP motorAccepts commonly used 1-1/8" hex shank bits and air tool bits