Enamel Pin to Necklace converter

I wanted to wear some of my enamel pins in situations where I was unable to pin them to a piece of clothing, so I built this adapter. It is designed to take a fairly large pin with a single thorn of ~1.5mm diameter or a pin with two thorns that are 16.25mm (or half of that) apart.

This is quite specific but maybe someone can use it.