Hand Coffee Grinder Drill Bit

thingiverse

update: after trying this, the stem breaks very easily. I don't recommend trying it without a lot of modification first. This a slightly shortened version of the original drill bit adapter so that it works with those skinny stainless steel hand grinders on Amazon (the ones that fit inside an Aeropress). There are tons of similar/identical grinders under different brands. I assume they all have the same size handle attachment thing so I imagine this will work on any.