Toleranced fidget ring design for assembly. Four races designed to change up the look when you get tired of one. The knurl and helixes are designed for strong tactility. The thing is set to 120% of original design, so if the inner and outer rings are loose, scale down a bit to tighten the fit (or use glue). I gave these to a couple medical specialists who work with children with disabilities and ended up handing over a lot more. They said it was great for those with ADD/ADHD, so I'm placing those tags here. YMMV.6 pieces will be printed as-is. 4 are "races" and only one is used at a time. Place one race on around one ring, then sandwich the whole thing together with the other ring. Ideally, these should have a slight interference fit, meaning they can be assemble and disassembled at any time.