Bow Stop Roller Made from non-marring poly blend with UV inhibitors. Won't mark up the hull with ugly black streaks. Bell Stop Assemblies Made from non-marring poly blend with UV inhibitors. Won't mark up the hull with ugly black streaks. Stainless steel hardware. Spool Roller Made from non-marring poly blend with UV inhibitors. Won't mark up the hull with ugly black streaks. Self Centering Keel Roller Made from non-marring poly blend with UV inhibitors. Molded grooves center boat as it moves forward for easier loading. Replaces any 12" roller with 5/8" shaft. Keel Roller Made from non-marring poly blend with UV inhibitors. Won't mark up the hull with ugly black streaks.