The Multiscanner® Onestep™ finds the stud center in one step, and works for finding both wood and metal studs. Also scans for metal - finding pipes, nails, rebar and other hidden metal. Detects and traces hot, AC wiring, keeping you safe. Dual sensitivity scanning feature - normal up to 3/4" or DeepScan® up to 1 1/2". Large easy-to-see backlit LCD screen.