Puzzle Hanayama L5 Helix Derwent inktense five double-sided 4-pocket pages for

five double-sided 4-pocket pages for your datasheets or index cards

Minor drops and bumps are no problem for this sturdy

They can even be used to paint small details with acrylics such as cockpit instruments in aircraft

The Artline 230 technical drawing pen has acid free

Dimensions: 463 x 236 x 33

Puzzle Hanayama L5 Helix Derwent inktense five double-sided 4-pocket pages forDescriptionSpecificationsShipping 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. The inspiration of this puzzle is the morning glory. The puzzle was designed to look like a bud that comes into bloom with twining tendrils. The original concept