Specification: Product Name:Plastic Rivet Material:Nylon Color:Black Max Diameter:20mm/0.78" Total Length:25mm/0.98" Stem Length:20mm/0.78" Fit Hole Diameter:8mm / 0.31" Descriptions: Rivet post pressure expands legs for fast and permanent fastening. Used widely for car fender, bumper, door or other car suface. Push in type, are made of the plastic material, fit 8mm diameter hole. Insert the female part into hole, push the male part to the bottom, closed position. To uncouple the two parts, unhook the male part by using a tool under its head. Package Included: 120x 8mm Hole Plastic Rivets FAQ: .