DEWALT DCK255X 18-Volt XRP Hammerdrill/Impact Driver Combo Kit Plastic / Metal Imported DCD950 XRP 18-volt cordless hammerdrill with patented 3-speed all-metal transmission and 1/2-inch self-tightening chuck delivers 450 units watts out of maximum performance. DC825 18-volt Impact Driver delivers 1,330 in-lbs of torque and 0-2,400 rpms offering power and speed to perform a wide range of fastening applications at faster speeds Provides power and speed to perform a wide range of fastening applications at faster speeds