he ED-SSB-52171-KSSX-1 is a 4-inch square steel stud box with a bracket, designed for installation in wall or ceiling surfaces, typically used in electrical systems for commercial and industrial applications? Key Features: - Material: Steel - Dimensions: H 4 in, W 4 in, D 2-1/8 in - Volume: 30 cu in - Knockouts: Equipped with 10 knockouts (11 x 1/2" and 5 x 3/4") - Installation: To be installed with metal stud for wiring connection. - Design: Square junction box with brackets, offering strong support. - No Clamps