Square Bend U-Bolt Kit, Heavy Duty, Length (In.) 18 in, Width (In.) 4 1/4 in, Height (In.) 1/2 in, Steel Material, Silver Color, For Use With Truck Box, Includes (4) 1/2 in Thick Tie Bars, (4) Square Bend 5/8 in U-Bolts, (8) 5/8 in Hex Nuts, (8) 5/8 in...