Eyelet Tool

To set eyelets into paper or card, make a hole (using eyelet punch set 11810-0002), position the eyelet in place, and line up the setting tool on the reverse of the eyelet.  Tap the handle a couple of times with a hammer, and the metal eyelet back splits into a "star", which flattens against the paper or card to hold your eyelet securely in place.
 
This set contains 2 tools: one for mini (1/16") eyelets, and the other for regular/ large eyelets (1/8" and 3/16").