Application: Fender mounts or step pads designed for use with round fenders. Easy to install: Round fender pads mount with Trailer Bolts to the bottom of the on a boat trailer. There are no pre-drilled holes, and some necessary holes need to be drilled in the corresponding positions of the fenders. Upgrade Design: This fender pad mounts with bolts to the bottom of the aluminum I-beam on the boat trailer. This allows the other side to be used as a safety step and use a flat square surface to mount trailer fenders. Function: Boat trailer fenders prevent rocks kicked up by trailer tires from damaging vehicles following the trailer. These parts are often the first to show signs of wear. You can buy and replace it at Bonbo, our fender mounts are available for your boat trailer needs. Superior Material: Made of aluminum, it will not rust, support long-term outdoor work, provide higher strength and rust protection. High precision laser cutting, CNC folding, robotic assembly welding machine with strict quality control standards. /