This system includes :Fender-2pcsHex Adapter-2pcsStainless Steel Round Head Screw 3x14-4pcsStainless metal Flat Head Screw 2.5x20-2pcsStainless Steel Washer-2pcsProduct major function & usage:A great design part to protect a corner tires from sand and rocks. Hex adapter to widen the trunk wheel track.1. Made out of a light weight high tensile energy aluminum 6061 T6. A good design part to guard the trunk tires from sand and rocks when driving.2. Hex adapter is 3mm thicker than initial hex, to widen the rear wheel track and increases security regarding the vehicle when driving.