Strong And : Heavy duty truck canopy clamps can withstand heavy pressure, this clamp is especially useful if you have large fabric coverings mounted on the underside of the bed where the shell attaches to the bed, the clamps greatly improve stability. Easy Installation: You can quickly install them in minutes, just place the clamps into the bed, then place the screws into the holes and finally tighten the screws with a wrench, no drilling required. Material: Truck bed clamps are made of thickened aluminum material, strong, not easy to corrode, and wear-. Note: Please measure the size before purchase, the maximum size for hood clamps is 1.4 inches. Application: Compatible with cargo rails, for : , for Ram 1500/2500/3500, for : /, for : , for : , for : Colour:Black Material:aluminium Package Contents: 6 * Truck Cap Mounting Clamps 1 * multi-language instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.