Zircon MultiScanner i520 OneStep Center Finding Stud Finder: * Scans: metal, electrical and thick walls * CenterVision technology finds the center of studs in a single pass * Finds copper pipes (and other nonferrous metal) up to 1-1 2" * Finds rebar (ferrous metal) in concrete up to 3"D * Detects and traces hot AC wires * Patented SpotLite pointing system shines a bright beam of light over target center * ACT (Auto Correcting Technology) corrects common user errors automatically * Ultra bright display screen