Our boat trailer guide-on is designed of heavy-duty galvanized steel, thus, it can not be easily rusted or bent, and also, it will not be affected by saltwater. All necessary mounting hardware are included in the package, and we provide two carpet-padded boards to keep the boat away from scratches. Enjoy a day out on your boat without having to worry about whether your boat is protected. | Vevor | | Boat Trailer Guide-ons, 48", 2PCS Rustproof Steel Trailer Guide ons, Trailer Guides with Carpet-Padded Boards | Black;white | Best Buy