So I'm looking to use a weapon that is well known in the real world for its eastern Assassin usage in a homebrew game. The weapon (as seen here) is worn either on the pointer finger and pinky finger or attached at the wrist and pushed against palm of the hand, and is used by slashing across flesh, raking the hand against the target. (A nice demo video here.) Someone told me this is a weapon that exists in other DnD versions (he specifically said 3.5) but wasn't ported into Pathfinder; my question is whether or not this exists anywhere, and if it doesn't what are some of your opinions as to how it could be remade in PF as a custom item.
Also if I were to make this as a item, what sort of KN or Craft checks needed to be made (obviously Craft (weapons)) and what said DCs might be.
Thanks