Venn Puzzle cpl Accordion-style opening

Accordion-style opening

The contact point of this this coin is ceramic

With stowable backpack straps

Perfect for owners of Victorinox SAK like Cadet or Pioneer models

You can use it as a hand spinner

Venn Puzzle cpl Accordion-style openingA beautiful mechanical puzzle comprising three identical pieces, die cast in stainless steel and weighing almost 1 kg. The size is the same as a pool ball. The Venn Puzzle is a surprisingly difficult dexterity challenge and an intriguing addition to your desk, shelf, or coffee table. The assembled puzzle creates a perfect sphere so each piece makes up one third of the sphere by volume. While simple in concept, reassembling these three surprisingly