Milwaukee Shockwave impact duty bits are engineered to be very durable. The optimized shock zone geometry is unique for each tip to provide longer life and absorb more torque. The precise fit custom machined tip prevents stripping and reduces wobble, while the custom alloy76 steel proprietary heat treat process maximizes resistance to wear and shock. Contains 2 power bits 3/16" x 2" and 1/4" x 2".