The Handcuff
Chan Wai Man is Ah Keung, a thug and assassin who tries to go straight after his job becomes to dangerous. A series of events plunges him back into his former lifestyle and he find himself up against his old buddy who has now become a cop. Fights choreographed by Chan Wai Man.
Starring Michael Chan, Nora Miao, Tang Ching, Bill Lake, Lo Lieh, Pauline Wong Yuk-Wan, Lun Chia
Watch "The Handcuff" on Amazon released in 1979. It's a crime and action & adventure movie, and has a rating of 7.3 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.