Caliber Products Wide Multi-Glide Extensions with Hardware - 4-Pack/Black Deep-channel design suspends all types of carbide runners, reducing friction Reduced friction between ski and trailer makes loading and unloading quick and easy Multi-Glides Wide are designed to accommodate all dual-runner skis Eliminate damage to trailer decking caused by carbide ski wear rods Slotted mount system is designed to allow Multi-Glides to expand without warping