Squarely Nuts is a piece of kinetic art. Screws are supposed to be round, and nuts are supposed to have round holes. Not here. This is a demonstration that a square nut fits well on a square screw.
Watch the
YouTube video.
Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or
contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.