Used as a fidget toy to relieve stress and improve concentration. This is a puzzle ring interior. Apparently, it's a puzzle ring with a high level of difficulty, requiring a difference of about 0.1mm to come apart. Made of brass, it features a substantial weight and a unique luster. One-of-a-kind puzzle toy piece in a playing card collection, cube-in-cube art piece, Rubik's cube interior, modern stress reliever, hand spinner, for those looking for puzzle rings. Approximately 25mm x 25mm #modern #nordicmodern #monotone Overseas interior Flytanium Flycube #andtradition #nordic #stockholm #nordicfurniture