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  1. it’s a little pocket to put in a Shimano Link Pin.

    Nice idea but pretty useless as I always carry a quick link.

  2. It’s to unscrew the valve core on a tubeless valve

    They are cylindrical with 2 flat sides. You slip that over it so the tool is perpendicular to the valve, and use the leverage to unscrew the valve core. Can be really hard to do it with your fingers alone if its jammed up with sealant.

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