Always turn off the main power supply when working near live electrical wires.
The (associated with the model 47-400 series) is a critical tool for safely mounting heavy objects like televisions, shelving, and mirrors to your walls. Utilizing verified guidelines from official Stanley Tools Manuals, this comprehensive operating guide covers proper setup, step-by-step scanning techniques, safety protocols, and troubleshooting workflows. Initial Setup & Battery Installation
Identifies live AC wires, which is critical for safety when drilling or nailing.
: Open the rear compartment and connect a fresh 9-volt alkaline battery. stanley fatmax stud finder 400 manual verified
Doubles the scanning depth to look through double-thick drywall or heavy subfloors up to 1.5 inches deep.
The tool emits a distinct, continuous tracking beep.
For a downloadable PDF of the instruction manual, you can look for the . Always turn off the main power supply when
If you answered "Yes" to all four, you are ready to drill. Using the with a verified manual and proper technique transforms you from a guessing homeowner into a precision contractor.
Place the unit in a vertical position, parallel to doors or windows.
Illuminates when the sensor detects the exact center of a stud. Initial Setup & Battery Installation Identifies live AC
: For maximum accuracy, scan from both directions (left-to-right and right-to-left) to mark both edges of the stud; the true center is exactly between these marks. Advanced Detection Modes
When the icon appears and an audible tone sounds, you have found the stud center. Use the marking channel at the top to note the spot. Important Safety & Recall Notice