Square Boxes and Extension Rings are manufactured from durable pre-galvanized steel, and are designed to house and protect electrical wiring, switches, receptacles, and to support light fixtures. All steel boxes are UL listed and acceptable for use in 2-hour fire rated walls and ceilings. 8-32 cover mounting screws are assembled.
- 4 in. sq. x 1-1/2 in. deep
- Welded steel construction with "USB" bracket for wood or metal studs
- Supplied with nine (9) 1/2 in. and five (5) 1/2-3/4 in. TKO knockouts
- Combination Phillips/slotted screw heads
- 21.0 cu. in. capacity
- Note: product may vary by store