For the most secure hanging, you need the center of the stud, not the edge.
Visit the official Stanley Tools support website and search "SHP400" or "FatMax 400 manual PDF." stanley fatmax stud finder 400 manual
Arthur slid it slowly to the right. The LCD bars grew like a digital forest until— BEEP —the red center light flared. He marked the spot. But as he moved to find the next stud, the device didn't just beep; it wailed. The AC warning icon flashed frantically. For the most secure hanging, you need the
Proper calibration is critical for accurate readings. If you calibrate directly over a stud, the unit may fail to detect anything when moved. STANLEY® Tools : Connect one 9V alkaline battery to the clip inside the back door. He marked the spot
: Move the unit in a "Z" pattern across the wall surface.
: The device adjusts to the wall's density automatically upon startup to ensure accurate readings. Operating Instructions How To Use a Stanley Stud Finder