This little design fits into the empty hole of a Razer Panthera Arcade Stick after you have installed the JLF Link Mod by PhreakMods. The mod requires you remove the inner dust washer. The outermost diameter is the size of a dustwasher (36mm) with the outer diameter of the first shaft piece at 24mm, and the outer diameter of the innermost shaft at 12mm.
It simply sets in and takes a fair bit of shaking upside down for it to come loose. Constructive comments are welcome. I will be reprinting this without a raft to get a better top finish.