Madison Electric Products Shark Tooth 1-Gang Gray Polycarbonate Old Work Standard Round Ceiling/Wall Electrical Box

The built in hole saw creates the perfect sized hole every time. A piercing drill bit located at the center of the blade allows for location accuracy during installation. Raised mounting rings with center hole are located inside the back wall of the box for surface mount installations, basement or attic studs. Requires 9/16 In. driver (not included). Supports fixtures up to 6 lbs. 2-1/2 In. deep. Volume 16.5 Cu. In.