Thread: Coloured heavy-gauge Gütermann thread from Germany

Specs: Large

Retractable lead sleeve protects graphite and eliminates nib wobble

Don't let the low price fool you

One of our slimmest designs

Tetra Puzzle Color:Stainless Steel Thread: Coloured heavy-gauge Gütermann threadA beautiful and captivating mechanical puzzle composed of four identical pieces of stainless steel. ______ The Tetra Puzzle is a fascinating and immersive challenge to understand and unlock. It activates your spatial reasoning and manual dexterity skills in a way that's deeply engaging. On first glance it might seem fairly straightforward; in reality it's anything but intuitive. Solving it requires focus, attention, and an exploratory mindset. It