uxcell 100 x 9mm Hole Plastic Rivets Fastener Push Clips Black for Car Auto Fender;

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 9mm 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.