1Applicable Model: Replacement for Chevy Silverado 1500, 2500, 3500; Replacement for Chevy Sierra 1500, 2500, 3500; Replacement for Ram 1500, 2500, 3500; Replacement for Ford F250 and more. 2Main Function: The truck mounting clamp is designed for mounting truck caps with fiberglass or aluminum rails. It can meet your various installation needs and provide convenience for your travel. 3Wide Application: This item is a set of 8 pieces, which can be used as truck topper clamps, ladder rack clamps, truck bed clamps and truck cover clamps, canopy clamps etc. 4Durable Construction: Truck bed clamps are made of aluminum, which has high hardness and is not easy to rust and corrode, ensuring maximum strength and service life. 5Easy Installation: Install around the mounting bracket of a large camper or truck lower lip. The bolts can be tightened quickly with a wrench or a ratchet without drilling.