8mm Hole Punch, Eyelet Setter and Anvil. To use put your eyelet through your hole in your project. Use the punch where you want the hole in your project and tap with a hammer. Put the 8mm eyelet through the hole; turn it over and put the end of the setter on the back of the eyelet - the front of the eyelet will be face down on anvil . Tap the end of the setter with a hammer. If you would like the eyelet flattened further remove the setter and tap the eyelet back directly with the hammer.