: With the button still held down, slide the device horizontally across the wall. Moving too fast can lead to inaccurate readings.

: Press and hold the activation button on the side. The device will emit a series of tones or show a "CALIBRATING" message on the LCD.

to find the other edge of the stud and mark it.

: When the device detects the edge of a stud, it will beep or light up.

using the integrated marking channel at the top of the device.

Stanley Fatmax Stud Finder 400 Manual May 2026

: With the button still held down, slide the device horizontally across the wall. Moving too fast can lead to inaccurate readings.

: Press and hold the activation button on the side. The device will emit a series of tones or show a "CALIBRATING" message on the LCD. stanley fatmax stud finder 400 manual

to find the other edge of the stud and mark it. : With the button still held down, slide

: When the device detects the edge of a stud, it will beep or light up. stanley fatmax stud finder 400 manual

using the integrated marking channel at the top of the device.