Ninjutsu Training Shuko

The is a Training Shuko used for Ninjutsu, i've made these as a replacement of the metal ones you can buy to be able to train more safely and prevent your training partner against harm.
These can be used in the hand to hand techniques used in the Togakure-ryū.
please do not use these against bokken (sword techniques) the ring around the hand cannot take the impact and the pins are likely to break, tested this myself :)
I've made another model which can take the impact.