A very rare type; I can find no examples through Google and no record of past or present eBay listings; I can't even find any other pucnhes made by the Ideal company. It makes a very small hexagonal shaped hole; I'm getting a "hanging chad" result, and I don't know if that's due to wear or was by intentional design. It has an unusual hairpin shaped spring, which is uncommon on punches of this type.The frame of the puncher is of forged rather than stamped steel which gives it a substantial feel.