The Kushi butterfly knife from Azan has a cool "comb" blade. The stainless steel trainer-style blade has dull edges for the novice user looking to improve his/her flipper skills. In addition the blade has two tang pins, which means that the handles won't hit each other; lock-up is tighter and blade wear is reduced. The Kushi has good action and a light feel.
Note: Be sure to maintain all screws with loc-tite. These may come with slight imperfections, but make a fun knife.
Specifications:
Overall: 8.85"
Blade: 4"
Closed: 5.1"
Weight: 3.2 oz.
Manufactured by Azan