This is a Hot-Dipped Galvanized Fender Mounting Bracket for your Single Axle Boat Trailer. There are many variations of these fender mounting set-ups so check the measurements to ensure this one will work for you. Ideally, on your single axle boat trailer, you would use two of these fender brackets to mount your Single Axle Trailer Fenders. These Galvanized Fender Brackets are most commonly seen on smaller Galvanized and Aluminum Fenders used for 13 inch tires and down to 8 inch trailer tires. You would mount one towards the front and one towards the rear of the fender. This is a listing for (1) Bracket, you would commonly need (2) to replace an entire fender.