Everything you need to securely hang pictures, mirrors, and more. Includes a StudSensor stud finder, nails, and assorted hooks rated from 10-Pound to 75-Pound capacity. The StudSensor stud finder quickly and easily locates the edges of wood and metal studs behind drywall. FEATURES: Locates the edge of wood or metal studs up to 3/4-Inch (19 mm) deep - Red LEDs light up every time a stud edge is approached - An audio alert and green LED signals when the stud edge is reached - Should scanning begin over a stud, Zircons patented "over-the-stud" indicator alerts the user to start the scan in a new location - Patented TruCal technology calibrates to any walls density and a steady green LED TruCal light alerts the user when the tool is calibrated and ready to scan