Compatible with all Hitachi Lithium Ion, NiCd and NiMH 18V batteries Electro-Pneumatic mechanism produces 1 ft-lb of impact energy over 25% lighter than competitive models perfect for overhead drilling power mode for quick and efficient drilling in larger diameters save mode to conserve battery power and prevent bit bending idle strike restrictor prevents no-load hammering and eliminates uneccessary wear convenient 5-position belt hook with integrated LED work light slip clutch protects user and tool gears in the event of a bound bit quick bit insert for fast accessory changes externally accessible carbon brushes for easy maintenance Includes: Side Handle Depth Gauge