UNIVERSAL FIT - Universal roof box u-bolt clamps fit for most cars, fits van cargo carrier roof box PACKAGE INCLUDED - Roof box rack mounting fitting U-Bolt clamp kits included 4pcs galvanized U bolts, 4pcs plastic backplane, 4pcs rubber gasket, 8pcs heavy lock nuts, 2pcs strap GALVANIZED STEEL MATERIAL - Universal roof box u-bolt clamps using galvanized steel material, durable, good alkali resistance, acid resistance, corrosion resistance, strong temperature resistance NOT EASILY DEFORMED - Roof rack mount u-bolt clamps has a rubber gasket and a plastic back plate, which can protect your car from scratches to the greatest extent, and can increase friction, which has a high hardness, good confinement effect, strong bearing capacity RUGGED AND DURABLE-DEEP - Universal roof box u-bolt clamps has a clear thread, uniform force and not easy to slip to improve overall stability