This heavy duty steel junction box is well suited for a variety of junction and pull box electrical applications. Heavy duty 16 ga welded steel construction. Screwed on flat cover with key holes for easy assembly. Boxes with knockouts have easily removable concentric knockouts on all four sides for industry standard conduit sizes. Four wall mounting holes in back. Embossed grounding hole in bottom allows easy access and flush wall mounting. Durable ANSI 65 gray powder coating. Complies with NEMA and UL type 1 rating. Ul listed. Ratings : NEMA 1. Cover included. Knockouts, wall mount features.