Bosch Freak 18-Volt 1/4-in; 1/2-in Cordless Impact Driver (1-Battery Included)Versatile Freak impact driver with 1 4 In. quick change hex shank and 1 2 In. square drive for use with bits and sockets Innovative impact driver eliminates using socket adapters, while variable speed trigger provides user control driving fasteners Powerful, efficient 18 Volt motor delivers a max of 1,600 In. Lbs. of torque, up to 3,600 impacts per minute and 0 2800 rpm Hammer and anvil system designed for maximum impact energy Single focused LED