Fits and holds a 4 pin harness perfectly! Mounted to my bumper with some screws. Stays in place and looks clean!
I was concerned I might have to cut the wires, but adding a little bit of lube to the plug and it snaped in perfectly.
I apply some silicone grease to the plastic plug and it slipped right in to the slot. Otherwise it is kind it impossible to slide it in. This is actually a great solid product that would make the wiring more neat. I bought an extension to go from that plug to the trailer.