DCK200D1P1: Tackle tough jobs in tight spaces with the ATOMIC 20V MAX Hammer Drill/Impact 2-Tool Combo Kit. This kit features our shortest 20-Volt MAX hammer drill, the ATOMIC 20-Volt MAX Brushless Cordless 1/2 in. Hammer Drill (DCD799), an ATOMIC 20-Volt MAX Brushless Cordless 3-Speed 1/4 in. Impact Driver (DCF850), (2) DEWALT 20-Volt MAX batteries and a charger. This combo kit helps you complete your work in hard-to-reach areas. DCH172B: Tackle demanding jobs with this high-performance ATOMIC 20-Volt MAX 5/8 in. Brushless Cordless SDS Plus Rotary Hammer. The DEWALT brushless motor and durable German-engineered mechanism deliver 1.4 Joules of impact energy. The lightweight and compact design makes this tool ideal for rod hanging, concrete forming, cable tray and strut mounting, clip and bracket mounting and railing mounting. It is part of the PERFORM and PROTECT (TM) product line, integrated with the SHOCKS ACTIVE VIBRATION CONTROL (TM) System and becomes OSHA Table 1 Compliant when used with the DWH200D shroud and DWH161D1 dust extractor. Includes DCK200D1P1 and DCH172B.