This an "Optional" Hand Tool: To use with some of The Prym Range of Non-Sew Fasteners:
Example: For riveting press fasteners, eyelets, jean buttons, rivets...
Or you can simply use this tool for Piercing/Hole Punching, by buying the optional cutting tools:
You can also buy Our Prym Vario Kit (Hand Tool included) Which is great value; see below...