Iron Fists
King of Prodigal Boxers (original)
Chen Kuan-Tai and Mang Fei team up to bring justice to a ruthless gang of martial arts experts.
Starring Chen Kuan-tai, Mang Fei, Lau Kar-Wing, Wong Ying, Chan Wai-Lau, Wilson Tong, Leung Kar-yan
Watch "Iron Fists" on Tubi TV released in 1979. It's a action & adventure and drama movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.