Zircon 61961 i65 OneStep Stud Finder Stud Sensor I65 Onestep Finds Center &amp; Edges Of Studs &amp; Joists Finds Copper &amp; Other Non-Ferrous Metal Pipes Up To 1-1/2&quot; Deep Finds Rebar &amp; Ferrous Metal In Concrete Up To 3&quot; Deep Also Detects Hot AC Wires