Magnetic Stud Finder by CH Hanson
Most Accurate Stud Finder
Using a magnet to find the hardware in studs is the most accurate way to find a stud. This simple, non-electric gizmo really works — much more consistently than other stud finders I’ve tried. You could make your own using a supermagnet, but this one comes ready to go with two large supermagnets mounted in a easy-to-hold device with a level. You swipe it around the wall till it pulls itself to a nail or screw underneath. Perpendicularly up/down is your stud. It’s strong enough to work through baseboards. No batteries, lasts forever.
Submitted to Cool Tools by Kevin Kelly