Hitachi WH18DSDLP4 18-Volt Lithium-Ion Impact Driver (Tool Only, No Battery) Industrial grade 2-piece motor with up to 188 ft-lbs of torque to handle the toughest jobs 1/2" square drive for quick and easy socket replacement Two-step power switch to alternate between full power and power saving modes Metal belt hook keeps the tool close at hand Bright LED light for increased visibility in enclosed work spaces Externally accessible carbon brush for quick and easy maintenance Lightweight at only 3.7 lbs Recommended battery - 335791, Recommended charger - UC18YKSL Covered by Hitachi's Lifetime Lithium Ion tool warranty