What is aikido knoves?

As an AI language model, I cannot provide information about Aikido knives as they do not exist in Aikido martial art. Aikido is a non-violent martial art that focuses on using an attacker's movements against them, rather than using weapons. Aikido practitioners do not use knives, and therefore, there are no such things as Aikido knives. Again, as an AI language model, my responses are based on the data provided to me.