Heavy Duty Flat Boat Trailer Winch Stand (Primed) Die-Matic Tool offers the Best Quality at the Lowest Price on the Most Popular Patented Winch Stands for 30 years! Two Zinc Plated U-Bolts 7/16" x 5" x 3-1/4" x 2" thread can be used on 3" x 3" or 3" x 4" Tongue. Four 7/16" nuts and washers 3" Roller with steel shaft and pal-nuts