This Bosch 2-tool set combines drilling and driving versatility with next-gen 21700 cell technology. The set includes the GDR18V-1800C impact wrench and the GSR18V-535C Compact Tough drill. The 1/4" hex impact wrench provides a rotation speed of 0-1100/0-3400 RPM and produces 4000 impacts/min. It benefits from the Compact Impactor design and a head length of only 4.9", making it easier to work in tight spaces. It can handle the toughest fastening tasks found on the jobsite. The speed variation trigger enables tightening at a very precise speed. The variable speed drill (0-600/0-1900 RPM) incorporates the "KickBack Control" system, which reduces the risks of sudden rotational torque reaction in a bind-up scenario. The 20+1 precision clutch reduces fastener damage and prolongs tool life. The motors have electronic cell protection, protecting tools and batteries from overheating and overloading.