Cuts its own hole and mounts light fixtures, smoke and carbon monoxide detectors.
Not for use on lath and plaster walls.
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. Supports fixtures up to 6 lbs.