Review on IMBAPrice LV1 2PK Voltage Mounting Bracket by Daniel Shivashankar

A 2 1/8" x 3 5/8" hole is what you need to cut in your drywall for a perfect fit. Then simply tighten the screws to pull the locks onto the back of the drywall. You must first make sure that the path is not crossed by a hairpin. If you don't have a bar finder, search "Super Easy Bar Finder Trick for Walls and Ceiling Beams" on YouTube.