Handy boxes are manufactured from durable pre-galvanized steel and are designed to house and protect electrical wiring, switches and receptacles. All steel boxes are UL listed and acceptable for use in 2-hour fire rated walls. Device mounting holes are pre-tapped to accept 6-32 device screws. 1-7/8 in. DeepDrawn with Conduit KO's, Raised Groundpopular for exposed work applications (surface mounted wiring)