Bone, Fish and Yin Yang Shaped Karabiners
These are a fun item and have many uses. You could use them to keep your keyrings together (they are not a keyring in themselves). One lady even said she was going to use hers to clip her many dog leads together.
Whatever use you find for yours, they are a great novelty for yourself or as a gift to someone else. The Yin Yang Karabiners have a double gate.
All Karabiner shapes are available in Black, Red, Purple, Blue, and Green.