The Bosch 2-tool combo kit delivers professional cordless drilling and driving performance, combined with EC Brushless efficiency. The kit includes a freak bit/socket impact driver that has a two-in-one chuck that offers a 1/4 in. quick-change hex shank with power groove for bits and a 1/2 in. square drive for sockets. Its motor produces up to 1800 lbs. of torque and up to 0-3600 impacts per minute. The 1/2 in. hammer drill/driver is made to tackle demanding materials and applications (such as metal or masonry) anywhere on a worksite. This powerful hammer drill features 20+1 clutch settings, for reduced overtightening. Its efficient EC brushless motor delivers 490 lbs. of torque and a no-load bpm of 0-22000.