Set of 8 Pearl Jam keychains, designed to be printed with a 0.2mm nozzle and designed for 4mm (5/32") metal eyelets / grommets. Each design is on a separate plate, and each color is a separate object to make it easy to change or select colors.

After printing, remove the supports, insert a metal eyelet through the bottom of the hole, and then use a grommet tool to flare out the top of the eyelet. Because the eyelet is recessed into the model slightly, I've found that the plier type of grommet tool doesn't work as well as the mallet and punch style. I suggest using something similar to this model from Amazon:https://tinyurl.com/yyt726u4

Any standard snap ring should work with these. I used 25mm (1") OD snap rings, which is what is shown in the photos.