Features:Made of aluminum alloy, strength, hard to be corroded.Featuring corrosion resistance and high hardness, the mounting clamp provides a long service life.Featuring simple installation, the mounting clamp is no complicated tools required. Meanwhile, it is easy to use and is the best choice to replace old or broken parts.Designed for mounting truck caps or covers with fiberglass or aluminum rails, help you secure a hard tonneau cover or campers shells to the side rails of your pickup truck bed.Stay tight all the time.Fit firmly to your truck and capslid. No drilling required.Specifications:Material:Aluminum AlloySize:Approx.85mm3.34'x78mm3.07'Color:Black,SilverNote:Please allow 1mm errors due to manual measurement.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Package includes:4Pcs Truck Cap Mounting Clamps