Stay tight all the time.Fit firmly to your truck and caps / lid No drilling required Featuring simple installation, the mounting clamp is no complicated tools required Meanwhile, it is easy to use and is the best to replace old or parts Featuring resistance and high hardness, the mounting clamp provides a long service life aluminum alloy, strength, hard to be corroded 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, Manufacturer: LiRRvb