Bosch Freak Core18v 1/2-in Variable Speed Brushless Cordless Impact Driver (1-Battery Included)Two in one impact driver and wrench design features a hex shank with power groove and a socket drive and an EC Brushless motor Two in one bit socket includes a 1 4 In. quick change hex shank and a 1 2 In. square drive, for using either bits or sockets CORE18V battery provides next gen Li ion 21700 cell technology in a lightweight, high power battery with optimal performance Bluetooth connectivity (when the optional GCY30 4 Connectivity Tool Module is