Made with comfort in mind, the StudSensor Pro25 stud finder features an innovative contoured design for an improved ergonomic grip. Its bright user-friendly interface clearly identifies the edges of wood and metal studs. Securely hang pictures, mirrors, shelves and more.StudScan mode locates the edges of wood and metal studs up to 3/4 in deepREADY light indicates when calibration is complete and tool is ready for useEDGE arrow illuminates when the edge of the stud is locatedZircon’s patented “over-the-stud” feature alerts if scan begins over a studSpotLite pointer shines an arrow-shaped image on the scanned surface to clearly indicate the edge of the studA “V” marker groove enables accurate marking of stud edge locationErgonomic grip for a secure hold in either hand at any angle