Puzzle Collection > Cast Helix
- Name: Cast Helix
- Manufacturer: Hanayama
- Where to buy: Cast Helix at Puzzle Master Inc.
- Solution: Cast Helix
- Object: The grooves engraved in the two rotating boards are called "logarithmic spirals." These two grooves always cross at right angles, and a square hole is formed at their intersection. The goal of this puzzle is to remove the helix ring that goes through that hole.
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