Buddy Tools Mark N Guard - Professional Drywall Electrical Box Locator Tool - Quick Cut Out Tool for Sheetrock - Protects Wires from Damage (Set of 5)

It doesn't work like the video. At least on 1/2" d/w. A lot faster just to measure it out. Save your money.

This product is one over priced and really not useful and not as easy to use as the video shows

These didn’t work for us. Wouldn’t recommend.

useless, struggles to pierce 1/2" drywall. better off guestimating the position and using a rotozip bit.

It's useless in Canada with the metal box. It's sticking too far out and you won't be able to install your drywall with it. I try to trim it but now it's to large for the box and break when you force it in