orcinus24x5: Threading tool, HSS. Ground from an old broken endmill. I never throw out good pieces of metal, no matter how small they are. This is why!
tags: take that, bat girl!,
from: https://cid25.tumblr.com/post/78205100035
tags: take that, bat girl!,
from: https://cid25.tumblr.com/post/78205100035