Deep-channel design suspends all types of carbide runners, reducing friction. Reduced friction between ski and trailer makes loading and unloading quick and easy. Eliminate damage to trailer decking caused by carbide ski wear rods. Slotted mount system is designed to allow Multi-Glides to expand without warping. Ideal for open-place trailers and all ramps. Stainless Torx-head steel fasteners and driver included with all sets.