The MultiScanner™ HD900 center finding stud finder adds multifunction capabilities to also locate metal and live electricity in addition to studs. Ideal for DIYers and professionals alike, the HD900 makes projects big and small faster and safer. CenterVision® technology locates both the center and edges of wood and metal studs in a single pass making projects more efficient while WireWarning® Detection alerts you to live, unshielded AC wiring for safety. Switch modes to find ferrous metal, like steel, up to 3 in. deep, and non-ferrous metal, like copper, up to 1½ in. deep. To locate live, unshielded, AC electrical wiring, switch to AC Scan mode. Use to mount shelves, install lighting, or renovate spaces. The HD900 is an all-around tool that earns a spot in anyone's tool box.