DEWALT Cordless Ratchet DCF512B 20V MAX ATOMIC 1 2 Inch Brushless Wrench (70 ft lbs 250 RPM Bare Tool Automotive Fastening Engine Repair) Rabbeting Bit this high performance diagnostic tool solves this high performance diagnostic tool solves the problem of isolating live electrical hardware from dead lines across a broad spectrum from 12V to 1000V AC and 70V to 1000V AC Medium Bit Profile: Slices a clean 5 16 inch wide by 3 8 inch deep groove into wet concrete to manage internal slab expansion The DEWALT DCF512B ATOMIC 20V MAX Brushless 1 2 Inch Cordless Ratchet is a battery powered mechanical wrench engineered to deliver up to 70 ft lbs of maximum fastening torque in restricted configurations Industrial Equipment Repair: Driving high torque mechanical fittings on dense assembly lines or agricultural machinery sub systems