: The FatMax 400 starts at its highest sensitivity and self-corrects after you slide it past the first detected stud. This process optimises the reading for the specific wall and stud materials.

Wait for the to appear and a single beep to signal completion. Do not move the device during this 1–3 second cycle. Scanning for Studs

The (also known as model number 77-730) is an advanced electronic tool designed to scan through common building materials like drywall, plasterboard, and even concrete, accurately locating the edges and centre of studs, joists, and live AC wires. The FatMax name represents Stanley’s professional-grade line, built for durability and performance in demanding worksites, making this sensor a favourite among contractors and serious DIYers.

Note: If you calibrate directly over a stud, the unit will not function correctly. Move it a few inches and try again if it fails to beep .

This article provides a to ensure you get the most out of your tool. 1. Overview and Key Features

According to official technical data, the device offers several scanning capabilities: : Wood Studs : Up to mm) through drywall. Metal Studs : Up to mm) through drywall. Live AC Wires : Up to Metal Scan Mode : Up to mm) specifically for deeper metal objects like pipes.

For those using the electronic model instead, the Stanley S300 Manual provides instructions on its LCD display, AC tracking, and deep-scanning modes.

: Keep the activation button depressed and the device flat against the surface during the entire scan.

To avoid false positives or failures, keep these tips in mind:

For the most accurate results, follow this exact operational sequence. 1. Position the Unit