Keychain allen-key adapter (5mm)
thingiverse
I realized I almost never had my 5mm when i needed it the most, this way I'll never go without it! Small and compact, I glued a small allen key with super glue but id advise using epoxy or similar. I had to make the allen "hole" 5.5mm since my printer really isn't calibrated, you should play around with the scale if it isn't right.
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