Gunwale strap secure the entire aft section of the boat over the gunwale to the trailer and restrict vertical movement while on the road.Webbing: Strong 2 -wide webbing. Resists rot oils gasoline and most chemicals.Buckle: Quick-release (Over-Center) buckle. Easy to use yet secure and safe. Quick tightening – remove slack by pulling on the loose strap end. Cinch tight and secure by depressing buckle handle. Release by lifting the buckle handle.Hooks: J-Hook with snap closure for secure easy attachment. Electrostatic Discharge Coating (EDC) finish to prevent corrosion. Heavy gauge.