This is a Readybrake device. They have 2 types. One for a ball mounted tow bar and the other for a receiver mounted tow bar, however both types call for a receiver type hitch. I bought this on Ebay for $125, it came complete with instructions and all mounting stuff. The reason I chose a Ready brake system over a Brake Buddy (or similar) was because I didn\'t want to fool around with removing and setting back up something each time I unhooked and hooked up the towd to the coach. I\'ve tried to come up with a way to make the use of the towd the simplest possible way.