Two 10cm segments of braided paracord joined by a clip buckle clasp in the middle. With no particular purpose in mind, these cheap little items are purposed for whatever you can think of really.
If combined with a pair of carabiners you have yourself a quick detach buckle clip. If combined with paracord lengths you have spare rigging for camping rolls or tent straps.
Little items like these are best served as odds & ends you throw into your shopping basket to take advantage on the shipping cost. If you are already picking up a gun / bag / vest then why not just toss in a handful of odds and ends of little cheap things that might be useful as spare tidbits.