This low voltage old work box is designed to provide a secure method of mounting low voltage Class 2 devices, such as a telephone or cable TV jack, in an existing wall. Adjusts from a wall thickness of 1/8" to 1-1/8" and can be mounted horizontally or vertically. Will allow full unrestricted bend radius of coaxial rigid cable. Mounts solidly and securely to any surface. Will not pull out like screws or lags.