For what I'm guessing it's basically a novelty keyring, they are very well embroidered and sewn. I and a number of other drone pilots use them, often in combination with judiciously applied spray paint, to annotate elements of our aircraft that need to be removed before flight - most commonly camera/gimbal shutter covers like the one on my Yuneec Typhoon H Pro. . I am absolutely happy with them and they add a bit of professionalism and whimsy to my flights.
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