OK, but do you know what a "boxer's fracture" is? Any ER nurse/doctor can tell you that it's the fracture of either the ring-finger metacarpel, little-finger metacarpel OR both. Mainly due to those 2 fingers being unsupported by the wrist. Why do you think boxers need to wrap & glove-up while karate/kung-fu practioners don't. Also, in karate, the 3/4 or diagonal punch IS stronger because it's natural position doesn't over-rotate to horizontal. Providing you angle the index-finger knuckle slightly forward, you'll have a strong punch.