We are very proud of our game changing wheel lock/tire boot or as we have decided to call it the Trailer Anchor; because it does just that. It will dig into the ground in resistance to efforts to pull the trailer from where it has been parked. A central “hub” is attached to the tire rim and stays in place unless you need to change the tire. When locking, a lug nut protecting “cone” is placed over the hub, a large “leg” is positioned through the holes in the “hub” and then a “puck lock cradle” is placed and all is secured with your choice of puck lock. With tandem trailers, it can even happen that the “leg” will lift the side of the trailer and rotate around and lodge into the back tire thus locking both tires on that side of the trailer causing not only a significant braking action but if the thief is determined to drag it, in short order, both of the tires on that side of the trailer will be flat from friction with the road. Currently, we only have the 6 lug version, but we expect to have the 5 and 8 lug soon with the 4 lug to follow. If you have any questions feel free to reach out to us via Amazon's messaging system. Pre-Order 5, 8 and 4 Lug Nut Patterns with a $100 Deposit today. *Trailer width cannot officially exceed 8ft 6in. *Will only work on stock trailer tires (no aluminum rims).