Dimensions: Head Diameter: 20mm, about 0.8 inches Stem Length: 15mm, about 0.6 inches Fits Into 8mm Hole Package include: 100 pieces fasteners which will be enough for you to use. How to Use: Check the hole size of your car, make sure the hole size is 8mm. Remove the old clips with a remover tool from your car Put the two parts of the new clips together Push the clips into the hole Features: The push pins will be used for holding on radiator yoke, fender, bumper, splash shield,retainer, mud flap, grille etc. Very easy to install and remover easier with a rivets remover tool ( tool not included). Sturdy black nylon material will hold up the fender, bumper, splash shield,retainer tight and well.