These Vevor boat trailer guides are designed to improve alignment and help load your boat more smoothly and safely. Built from thickened steel with a galvanized coating, they offer durable support for bunk-style pontoon trailers used in freshwater environments. Extra-wide non-slip support pads help protect the hull from scratches during loading and transport. The adjustable design fits L-beam, box, and C-channel trailer frames for a more customized fit. Installation hardware is included for secure mounting.