The perfect and easiest way to set eyelets - no hammer needed. All in one - one end makes the hole, the other sets the eyelets. 3 sizes in the one pack - great value and easy to use too! Sets eyelets smoothly with no fuss... I do sell these in my store and find them the best way to set eyelets, not affiliated with fiskars and don't like most of their products - but this one is a gem!!