... captive screws, and rounded corners *Can be used as single-gang wall plate *Cover made from zinc, pre-coated The UL standard ... close a handy box or can be used as single-gang wall plate. Cover measures 2-5/16 in. wide x 4 ... captive screws, and rounded corners*Can be used as single-gang wall plate*Cover made from zinc, pre-coated steel*Covers designed ...