Protecting and Securing Your Boat: The columns are designed with rubber rollers that smoothly roll, effectively guiding the boat loading direction while minimizing friction and wear between the boat and the columns. This design protects the boat's surface and helps secure it during transportation, preventing lateral rocking. Adjustable Width of 7.5 Inches: After installing the guide rail, the height is 20.5 inches, with an adjustable width of 7.5inch/190mm on each side. This allows for quick and unobstructed loading of small boats such asfishing boats, dinghies, inflatable boats, and canoes of different widths without obstruction, ensuring their proper and secure positioning. Two Installation Methods: The U-shaped bolts can be flexibly installed on trailer beams with a width of up to 3 inches. These two installation methods are suitable for small fishing boat trailer models,ensuring a secure installation even on smaller frames. The upgraded M8 thickened high-tensile steel material provides a firm and stable attachment, preventing any wobbling or deformation. Galvanized Rust Protection: All metal surfaces are coated with a thick, non-peeling galvanized layer, ensuring that the guide rail can be used for extended periods outdoors near the sea. It provides corrosion resistance and all-weather durability, even when exposed to sunlight, rain, or prolonged contact with seawater, preventing rusting. Rust-Resistant Steel: The bracket is made from durable steel with reinforced inner walls, resistant to deformation upon boat impact. Thick, non-peeling galvanized coatings on all metal surfaces ensure long-lasting outdoor use near the sea, preventing rust even under harsh conditions.