Originally Posted by katana
Interesting....I've only known these as 'butterfly knives' ....used in several forms of martial arts weapons training. I've seen them used in Wing Chun training sessions and would be devastating in confined areas.
David, FYI another name in Chinese for these is:
Baat Cham Dao / Bat Chum Dao / Baat Jam Dao / Bart Cham Dao / Baat Jaam Dou = Eight-cutting knife
( Dao = knife and Jian = sword)
....I didn't see this term mentioned so I thought I would add it to the list