Adjustable electrical box with bracket for metal or wood studs allows for adjustment of the box to the wall surface by turning a screw on the metal bracket. Ideal for various drywall thicknesses and wall finished. Mounts square and secure every time. Comes preset at 1/2-inch, allow for adjustment up to 1-3/4-inch. PVC (polyvinyl chloride). UL (Underwriter's Laboratories) listed.