Made of plastic and aluminum for durability and stability. These replacement accessories keep tonneau cover in top working conditions,back up for the replacement. Fit for Hard Tri-Fold Tonneau Cover,Not for soft tri-fold tonneau cover. The prouct is in sturdy and high strength conditions, which is both wear and heat , not easy to break or deform. The is composed of triangular screw, front clamp, rear clamp and T-bolt. No Installation Guide or Instruction Included. Professional Installation is Highly Recommended. name:Tri-Fold Tonneau Cover Clamp Fitment:Fit For /For /For /For /For and so on Hard Tri-Fold Tonneau Cover Colour:Black & Silver Material:Aluminum+ABS Package Contents: 1 Set * Pickup Truck Cargo Cover Fixing Kit 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.