MECMO 7 Pin Round to 7 Pin Flat Adapter for Tractor Towing, 7 Pole Round to 7 Way RV Blade Trailer Connector Plug, SAE J560 Trailer Wiring Harness Adapter for Semi Truck Tractors Commercial Vehicle

this plug is what we needed to connect the trailer to the truck

Perfect product.

Works well just not far enough distance for my use.

Easier to use this then install a plug end on trailer or van when I need to hook up different thing on different trips.

This is not a good option if you’re trailer that you’re pulling has electric brakes. Mine did, and had I not stopped to pick up a part for my semi truck I was pulling my RV with, the RV would have caught fire and burned to the ground! When I stopped to pick up the part for my semi, I had noticed smoke coming from the wheels on my RV, I walked back to see if one of my electric brakes had happened to get stuck, but every brake on both axles were smoking, and all the bearing buddy's were blown off the axles from the grease expanding from being so hot. I was lucky, had I chose to wait until on my way back to get the part for my semi, I would have been cleaning up one hell of a mess on the interstate, and no longer had an RV & possibly even lost my semi from the fire that was imminent had I not stopped when I did.

Works perfect for your plugs

This is not wired up properly to use for a flat plug in. It locks the trailer brakes up…

Very nice unit works as describes great when you're by yourself plug it in hit the switch check the function works perfect recommend it to anybody