Stanley Fatmax Stud Finder 400 Manual — Verified

Install a fresh 9V battery. The manual is strict on this: “Do not use rechargeable 9V batteries as they provide inconsistent voltage.”

This article serves as your for the Stanley FatMax Stud Finder 400. We have cross-referenced original documentation, user-tested troubleshooting steps, and insider tips to ensure you use this device with 100% accuracy. stanley fatmax stud finder 400 manual verified

SFM400 Product Type: Electronic Edge/Center Finding Stud Sensor Detection Depth: Up to 1.5 inches (38 mm) for wood/metal studs behind drywall Install a fresh 9V battery