Don’t waste your money on this worthless invention.
Master Lock says……”It’s infinitely adjustable from 7 ¾” drop to 6 ¼” rise.
It sounds good. Just hook up your trailer, and turn the adjusting nut to raise and lower the tongue height. What could be easier?
To go from the upper range adjusment to the lower range adjustment, you first flip the hitch 180 degrees, and then unscrew and flip the ball upside-down.

But, they fail to mention that there is a 5 inch gap in the middle of that range where the ball can never be. And that gap just happens to be where my trailer hitch should be.

This invention is the winner of the Popular Mechanics Magazine’s, Editor’s Choice Award! You would think that the magazine people would actually try and use this thing before heaping praise on it. Maybe Master Lock is a long time advertiser in their magazine. Well, that's another $55.00 down the ol' scupper hole.

