Steel City 4 in. Square Box, Steel, Welded, 2-1/8 in. D, (3) 1/2 in. and (10) 3/4 in. Knockouts

The 52171 3/4 is a 4-inch square, 2-1/8 inches deep electrical box with multiple knockouts. It is designed for use in commercial and industrial electrical installations, providing a secure and durable housing for wiring connections and devices.