Feature 1HEAVY DUTY: Tough black rubber bow boat trailer roller with bracket, keel roller axle and mounting bolts. The bracket is made of sturdy galvanized steel to ensure long term use in harsh water conditions. 2PROTECTS BOAT KEEL AND HULL: Essential boat trailer accessory when towing, safely transports boats and reduces friction and wear between boat and trailer. Extremely strong and designed for heavier boats. 3WIDE APPLICATION: Used for loading and launching boats, including canoes, bass tracker boats, jet boats, small yachts, fishing boats, kayaks, commercial boats, sailboats, rolls boats. Smoothly roll the boat on the trailer, and guide the boat trailer in and out of the water with less effort. 4EASY AND QUICK STARTUP GUIDE: The boat trailer keel roller assembly kit's internal taper and V cut design makes operating larger boats easier. Premium replacement for worn out old keel rollers on boat trailers. 5MOUNTING BOLTS: Comes with 1/2 inch x 5 inch (W x L)mounting bolts for easy installation. If our mounting bolts do not fit your trailer holes, please purchase matching bolts.Item Type: Boat Trailer Rollers with BracketMaterial: Galvanized Steel + PlasticFitment: Fit for boat trailer Package List1 xBoatTrailerRollerswithBracket2 x AccessoriesNote