HOFFMAN A12104SU Extender pull box screw cover type 1 mild steel 12x10x4"

Type 1 screw cover pull box. The pull box extender, or step-up, product is designed to be used in commercial and general industrial applications that previously required a custom-sized pull box, or to create additional wiring space for existing pull box installations. Unique keyhole screw slots for easy installation. Plated steel screws included to mount to pull box. Compatible with type 1 pull box accessories. Maintains grounding between main enclosure and extender.