The Milwaukee® M12 Hammer Drill/Impact Driver Combo Kit contains the M12 3/8-inch hammer drill driver, as well as the M12 1/4-inch hex impact driver. For optimal power, this tool combo kit uses REDLITHIUM™ batteries for increased performance. The hammer drill can deliver up to 275 in-lbs. of torque, and spins at up to 1,500 rpm. The hammer drill is also built with a single-sleeve ratcheting chuck to allow for easy bit changes and optimal bit gripping. The hex impact driver is designed to allow for maximum fastening speed, capable of up to 1,000 in-lbs. of torque at up to 2,500 rpm. Both tools in this cordless tool combo kit are designed with ergonomic handles to increase comfort during prolonged use. In addition, each tool in the hammer drill/impact driver combo kit contain an on-board fuel gauge, allowing you to monitor the battery charge at all times to prevent sudden interruptions. A carrying case and charging station are also included.