Bosch 18V 1/2-Inch Drill 1/4-Inch Hex Impact Driver, Refurbished CLPK26-181 High-performance 4-pole open frame motor delivers up to 600 inch-pounds of fastening torque Durashield housing designed and tested to withstand multiple drops and damage for added durability Ratcheting single-sleeve 1/2-inch chuck offers simple 1-handed bit changes on the fly New ergonomic design with soft grip housing provides comfortable use in extended operations 2-speed transmission for high torque and high speed