Striking Wrench, 13 3 4 in, 2 3 8 in Opening ORS NASCO and cables or to find and cables or to find a break in a wire Patented automatic self test verifies the integrity of the unit Bright LEDs flash and audible alarm sounds if voltage is present Silent mode feature for use in quiet settings Automatically turns off after five minutes of non use to conserve battery life Used with Jackson Safety Curv O Mark® tools The large smooth striking surface reduces the hazard of glancing blows and lessens the chance of a rope slipping from the handle when maintaining tension on the wrench Proper clearance in overall head diameter that is necessary when working with flange connections