Mount this 2 inch Coupler on your 3 inch wide frame and get that trailer on the road. Whether mounting on a boat trailer or utility trailer, this Coupler has a carrying capacity of 5000 pounds and has a HEAVY DUTY Zinc Plated exterior to protect against the hazardous outdoor environment. 1/2 inch Holes in the coupler allows for easy bolt on installation. Using common locks, the lever lock design allows the user to secure the trailer and keep it safe while on the road.