60's/70's kung fu movie about finger punches that leave holes

[Kungfuconundrum]

Usual story. Watched this old vhs movie in the early 90s of a kung fu movie. I believe Bolo yeung is in it too as a minor villain. His fighting style would be him bending over low and sweeping people's legs i think.

But the biggest thing about the movie is the hero that can pierce peoples' skins with his punches. Not like through their entire body but little holes. There is also a general or some rank in the military and his son kills himself on a sword after losing a fight with the hero.

Please help!

[RCMerchant]

Could be FIVE FINGERS OF DEATH (1972)-which featured Bolo-and was also the film that started the kung fu craze in the USA-leading to the TV show KUNG FU.

[Rayo Casablanca]

Punching holes in people with his fingers?
Sounds like KILLER FROM ABOVE (77) (AKA COOL FACED HERO, FOREVER MINE) http://www.imdb.com/title/tt0188762/?ref_=fn_al_tt_1