Various rings that hold hex bits with a shank diameter of 1/4in~6.35mm.
You can also use it as a small screwdriver, although you may want to sacrifice an extra bit by gluing it in place if your going for an everyday carry type item. Considering these can't be scaled I included US sizes 5 through 15 as separate files. There are more types but because of how many files there are I'm splitting these up into different post. If you are unsure what your ring size is consider checking out another of my post("Ring Sizing Kit"):
https://www.printables.com/model/894227-ring-sizing-kit-international-guide
Printing Suggestions/Tips:
I find they look better with no brim enabled.
Printing Estimates/Stats:
Type F = 15% Infill - 4.87g - $0.10 cost(PLA) - 12m32s printing time
Type G = 15% Infill - 4.27g - $0.09 cost(PLA) - 11m30s printing time
Type H = 15% Infill - 6.11g - $0.12 cost(PLA) - 21m9s printing time
Type K = 15% Infill - 8.55g - $0.17 cost(PLA) - 18m20s printing time
Type L = 15% Infill - 4.91g - $0.10 cost(PLA) - 12m14s printing time
Link to Pack 1:
https://www.printables.com/model/904848-hex-bit-rings-pack-1
*Don't attempt to punch anyone with these. Use at your own risk. Not a toy. Be mindful of your eyes while wearing.
(Thank you to my friend that helped me with taking photos)
The author marked this model as their own original creation.