Orbit Industries' handy boxes and extension rings mount on the surface of the wall and are used in the installation of switches, receptacles and other electrical devices. They are constructed from 16 ga galvanized steel. The welded, 1-7/8 in deep boxes include 1/2 in knockouts. Selected models include an FB bracket to mount on the flat side of the stud and an AB bracket to mount on the face and side of the stud.