What are you waiting for? The grooves engraved in the two rotating boards are called "logarithmic spirals" in the Hanayama Cast Puzzle Helix - Level 5 from University Games®! 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!
Hanayama is known worldwide for challenging puzzles and quality manufacturing. Can you take the pieces apart, then put them back together again? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 5 puzzles are considered difficult by most puzzlers.
- Materials: metal
- Contents: 1 die cast puzzle
- Package: 1.75" x 3.75" x 4.3" (4.4 x 9.5 x 11 cm)
- Recommended for ages 12 & up
CHOKING HAZARD - Small parts. Not for children under 3 yrs.