This Galvanized Square U-Bolts were well made, can be used on trailers, boats or any other application that fits. Specification: Item type: Square U-bolts; Condition: Brand New; Color: Silver; Material: Steel: Surface finish: Galvanized. Package Include (2) 3/8"x 2 1/4"x 4 " Squared U-Bolt. 4 Galvanized Nuts. 4 Galvanized lock washers. Please use chart below for correct fit. LEG DIAMETER INSIDE WIDTH INSIDE LEG LENGTH THREAD LENGTH 3/8” 2 1/4” 4 ” 1 3/4”