• Zinc-coated for freshwater corrosion-resistance, not intended for use in saltwater or brackish water;Boat guides and rollers deliver excellent performance and long-lasting use;Our guides and rollers reduce friction and increase stability, providing a better overall trailering experience
• Pecision metal stampings, fabrications and assemblies，Includes one pair of Heavy-Duty Roller Guide-Ons with an easy, bolt-on installation that fits bunk or roller-style trailer frames up to 3" wide x4-1/4 "; 5" tall x4-1/4
• Custom-formed 97° arms and 13" roller assembly; up to 18.47" (3" trailer frame) or 15" (2" trailer frame) of horizontal adjustment
• Boat railer guide ons have been widely use to protect boat well. They are wonderful tool for sailboat trailers,ski boat trailers, fishing boat trailers, or Marine boat trailer and so on, making loading easier