When Fox made their UTV shock bodies, they used a different thread pitch than the truck and buggy shock bodies. Because of the thread pitch difference, the steel rings are used on truck and buggy shocks and the aluminum rings are used on UTV shocks.

This style of cross over ring replaces the old style that used to use two tiny allen screws to prevent it from spinning on the shock body. You’ll use two per shock and they jam against each other.