TL-FC16 to 32mm Nut-Adapter
thingiverse
You're likely to require this specific part from a major bike-part manufacturer if you want to securely tighten or loosen the headless screw at your bike's crank. Simply printing out this part will get you started, and all you'll need in addition is either a 32mm-nut ratchet or a manual hand driver to complete the job.
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