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.
To go further, within the gokui, we can say that there is a way of seeing “between time” (time intervals). There are some, like Tokugawa Ieyasu, who came to rule the whole of Japan through understanding the “changing intervals” (makeru 間化る) of losing (makeru 負ける). In contrast to this, there are examples of people who work hard to always score victories, but become so intoxicated with their abilities they mistake the “way of the samurai” (shido 士道 ) and hurry to death (shido 死道 ). - Masaaki Hatsumi, The Essence of Budo
Many people think that Muto dori is about the opponent wielding a sword while you have none, but this is not the case. Even if you have a sword, muto dori starts with the development of the courage to face an opponent with the preparedness of not having a sword. This means if you don’t thoroughly train in taijutsu you will not obtain the knowledge of the refined skill of Muto dor
i. Therefore, you must first know the purpose of the path of training. If you are unaware of this and proceed down the path of thinking that sword training is only about cutting and thrusting, than there is a danger that you will go down the path of the evil sword. The sword harnesses a pure essence that is life-giving—one who cannot live the way of the sword saint will foolishly think that the sword is only a tool for cutting. Those who do this can never achieve enlightenment. -Masaaki Hatsumi, Japanese Sword Fighting-Secret of The Samurai