Caliber Edge Glides XL Surface ProtectionProduct Features Product Features Generous coverage: Over 50% more coverage and surface area than the EdgeGlides 2. 0. Built tough: Increased size and strength make it ideal for multi use trailers, including car haulers and utility trailers. Weather ready: Built in traction knobs provide grip for tires and foot traffic when loading and unloading. Friction reducing tech: Calibers proprietary blend of resin provides effortless loading of snowmobiles.