Also this Kubotan is not a weapon ...

says the BKA. For me it is also a key chain and I feel a little safer when I'm early or late even business trips. He sits comfortably in the hand and the scratches that have left my keys on it do not bother me further. I can imagine that short and punchy kicks towards the thigh, upper arm or rib cage will leave a deep impression. And I'll also make sure not to hit a dead end in order to escape further possible attacks.
A strong buy recommendation.