Ring-Dinger

The Ring-Dinger is a small bell designed to be worn on the index finger. It was originally designed to be used by electric unicycle riders (as EUCs don't have handlebars to mount a traditional bell to) and is basically a 3D printed version of Rockbros "Finger Bell" that is no longer available.

While Rockbros still make an excellent handlebar mounted bell, they unfortunately stopped producing the "finger" version of their bell several years ago. This model is designed as a replacement of this original "Finger Bell" and is intended to use components from their current "handlebar" bell as a donor.

There are 4 models available, with an 18mm, 20mm, 22mm and 24mm hole to slide your finger through. I use the 22mm version myself and ware it on the middle segment of the index finger rather than the third segment (up next to your knuckle) where most would think to have it, but obviously you can ware the bell however works best for you.

Note there are plenty of cheaper knockoff versions