This handy portable set from Bosch includes an impact driver, a hammer drill, (2) 4.0 Ah CORE18V batteries and an 18V charger. Both batteries feature next-gen Li-ion 21700 cell technology for more lightweight and high-efficiency tools. The 2-in-1 impact driver chuck combines a 1/4" quick-change hex shank and a 1/2" square drive for either bits or sockets. Its powerful motor delivers a peak torque of 1,600 in-lb and up to 3,600 impacts per minute. The Compact Tough hammer drill features a short head (only 7.9" in length) for use in tight spaces, and its 1/2" Auto-Lock chuck is designed for faster bit changes. Tools and batteries are protected from overheating and overload thanks to an electronic system with automatic shutdown. Finally, each tool features built-in LED lighting for optimal visibility and a long belt clip for a more secure hold.