A compact tolerance-based puzzle where 9 circular coins fit easily within a square recess, with the challenge of fitting a 10th coin without force. When solved correctly, the final coin drops into place naturally.

Features

• Precision tolerance puzzle design

• Sliding lid with latch mechanism

• Compact desk-sized format

• Optional decorative coin finish via infill patterns

Technical Details

• Format: STL

• Print orientation: Flat on bed

• Supports: Not required

• Material: PLA recommended

• Nozzle: 0.4mm recommended

• Requires accurate printer calibration

Files Included

• Puzzle base STL

• Sliding lid STL

• Coin STL

Usage Notes

Multiple coins must be printed.

Puzzle performance depends on print accuracy and dimensional consistency.