nostr:npub1v7t4yx9vxtv3mat0hdsduuym4fvjd5dzmdlh82ssa40phr965h2s2lck6k nostr:npub1u83gudwdfwjngz5eqxkrnpvsuydvqwjxwz0majvehqrh62804hfq8yr2s5 this is a good brand of flex shaft electric die grinders:

https://www.foredom.net/product-category/flex-shaft-combinations-kit-and-sets/

if you have a decent air compressor just use an air grinder