The Vevor boat trailer guide-on set is designed to help align and load your boat more easily while protecting it during transport. Its heavy-duty steel construction features a powder-coated finish for durability and resistance to rust and saltwater exposure. The included 24-inch carpet-padded boards help prevent scratches on your boat. Adjustable width and flexible top or bottom mounting make it suitable for a range of trailer setups. It is ideal for ski boats, fishing boats, and sailboat trailers.