This is a redesign of my original Ratchet Fidget Ring now optimized for more clickiness.
The ring features a ratchet mechanism to make it click and can be printed in one piece (print-in-place). The inner diameter is 18mm but I supply the parametric CAD files for various finger diameters.
I tested this by printing it in Prusament Signal White PETG with a layer height of 0.15mm and a 0.4mm nozzle on a MINI+ but I think it should work with various print settings up to 0.2mm layer height.
Initially, the ring might be a bit stiff and hard to turn. You may require a small (!) amount of force to detach the inner ring. If it does not rotate easily enough, you can use a bit of oil or WD-40 to lubricate it.
The author marked this model as their own original creation.