These Vevor boat trailer guides are designed to make loading and aligning larger boats smoother and more controlled. The roller-style design helps guide the hull onto the trailer while reducing the chance of scratches during transport and positioning. Built from thickened heavy-duty steel with a galvanized coating, they are made for long-lasting strength in freshwater use. Adjustable height, angle, and width settings allow a more precise fit for a range of trailer and boat setups. They are suitable for larger fishing boats, runabout boats, and other boats over 16'.