use lightly Performance flat knuckles from punching Many curl Destiny
Is it true that punching hard things toughens your fists? - Quora
boxing - Avoiding Knuckle Scrapes with Bag Work - Martial Arts Stack Exchange
So I heard that all your knuckles should be straight when punching. but my pinky is a pacifist I guess, what can I do to improve and does it matter? : r/martialarts
Broken Knuckle on Finger: Symptoms, Diagnosis, and Treatment