thingiverse
A walnut themed nutcracker.print the walnut with the nut entry hole facing up, supports needed.Included is a modifier object to be placed at the "bowl" where the nut gets held for cracking (it should go in the right place if they are both added together, at least it seems to work in orca). You can then bump up the walls to 7 or 8 for that section to create a good solid loop around where the nut is held.
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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.