thingiverse
A mod on my earlier Key Float design, I attempted to make it a Floating Minion for your key. Printed at .7 of the original size will float one key. After printing, use Super Glue to hold the parts together and you are ready to float. Use as thin a key ring as possible to attach your boat key.
Direct link to the original creator's page
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.