Hitachi G18DSLP4 18V Lithium Ion 4-1/2" Angle Grinder (Tool Only, No Battery) High torque motor to power through the toughest cutting and grinding applications Overcurrent protection circuit shuts down battery power in the event of an overload situation, reducing the risk of causing permanent motor damage Zero voltage safety reset prevents accidental start-up when inserting a charged battery Elastomer covered handle for a less fatiguing and slip resistant grip Externally accessible brushes for quick and easy replacement of worn carbon brushes