Shock Therapy billet preload collar available for Fox Shocks in 2”, 2.5” and 3” sizes and Walker Evens 2.5” size. Are you tired of using a screw driver and a hammer to adjust your ride heights? We are too. So, we designed a single piece, billet pre load collar that you can adjust with a simple straight handled tool. No more mangled pre load nuts. No more cut hands from spinning the factory nuts. No more broken knuckles from slipping off the factory nuts while adjusting. Not only are these billet pre load nuts stylish but they are seriously functional too. These are sold individually. PRELOAD ADJUSTMENT FOR RIDE HEIGHT: This is the most common adjustment and found on nearly every UTV shock. Preload adjustment is also a very basic way of adding compression, as more spring pressure will stiffen your suspension and less will give you a smoother ride. Increasing preload also means increasing ride height, which will also affect your handling.