2-way tool retainer - accepts standard 1 1/8" hex, air tool steel with retaining collar of Bosch internal locking combo steel. Grease packed gear box and hammer mechanism eliminates uncertainty of job site lubrication. ServiceMinder™ brush system shuts the Brute off when brush replacement, lubrication, or preventative maintenance is needed. Shock mounted handles absorb vibration to reduce operator fatigue. The plug in anywhere hammer—does not need a compressor. 60 % more impact energy from previous model. New improved vibration reduction in Hammer mechanism and handle set with 50% less vibration than previous model. New non-slip housing cover helps prevent accidental falls when not in use.