The Neko-te were usually used by the kunoichi (female ninja).
The weapon is strong iron fingernails that were fastened into leather bands fitted on the fingers, and resembled claws (not like that of of the shuko, ashiko) and were also dipped in poisons. The eyes were a favorite spot for slashing.
The Kakute were rings that the kunoichi wore that were dipped in poison. The rings could be made out of metals, and tempered wood.
The ninja would quietly strangle enemies with the ring stuck in their neck. It was far less messy then using a sword, and left very little evidence on how the victim died.