Backbox: 5.80 in. deep with keyhole mounting slots on 16 in. centers, center opening to mount over electrical pull boxes, ground stud, embossed dimples on back plane for installation of board-mounted accessories, laser-cut knockout panels on top/bottom, and two keyed side locks. Front Mounting Section: Fully gusseted corners, triple formed wrap design mounts to backbox from inside with two heavy duty spring-loaded L-pins (self seating, positive locking). Welded sides with vents Beveled front corners Knockouts for wireless antennas One pair adjustable mounting rails tapped 10-32, printed RU scale Integral top/bottom rails on E.I.A. spacing for mounting or lacing Black wrinkle textured powder epoxy finish Pilot Point screws with captive washers Grounding stud