Stanley Fatmax Stud Finder 400 Manual Verified Link

: Provides wood stud detection accuracy up to 1/8 inch and metal detection up to 1/4 inch. ⚠️ Critical Safety Recall Notice In 2009, certain FatMax Stud Sensor 400 (77-730) Go to product viewer dialog for this item.

The Stanley FatMax 400 isn't a "point and shoot" device. It uses electronic signals to detect density changes behind your walls. If you don’t calibrate it correctly in "Air" mode first, you are going to get erratic readings every single time. stanley fatmax stud finder 400 manual verified