This thing is genius. I have two trailers with a 2" ball, and one older boat trailer with a 1 7/8" ball (why?). This is an elegant solution to the problem. There's no way to lock the balls on the post, so I keep the balls in my truck so they don't get stolen. When I need to tow, I'll just dig out the right size ball and toss it on, it only takes a second. I can do it without a screwdriver, it's not that tricky. I've had this on my truck for about a year and haven't had any problems taking the balls on or off, even after getting the hitch muddy. I'm not towing anything heavy, my heaviest trailer is maybe 1000lbs, but it tows just like any other ball.