This hot dipped galvanized winch seat is perfect for quick an easy replacement of your worn or broken winch seat. Able to fit on a 2 wide or 3 wide winch post (not included). This boat trailer winch seat also has multiple holes to fit many styles of winches. Also included with this winch seat is a 4 bow roller and end caps. The poly roller and end caps are held securely to the winch seat with a stainless steel bolt. This particular Boat Trailer winch Seat mounts to angled Boat Trailer winch Posts. You can view the options in this same Category. You would Mount this Winch Support to the Winch Post with (2) 1/2" Diameter U Bolts that measure 2 or 3 inches Wide. The Width and length of U Bolt Used to mount this item would depend upon the dimensions of your Winch Post. A 2" Wide by 3" Wide Winch Post would need (2) Galvanized Square Ubolt 1/2 inch x 2 1/16 inch x 4 5/16 inch U Bolts. A 3" Wide by 3" Wide Winch Post would need (2) Galvanized U-Bolt 1/2 inch x 3 inch x 4 5/16 inch Trailer U-Bolt U Bolts.