This stick also known as kubaton sticks, key sticks,palm sticks, pen-shaped sticks, tea cones, piercing cones, etc., are a kind of daily products. Most users are women and students. The structure of the kubotan is simple, it is a small stick shorter than disposable chopsticks. Generally, the length of the kubotan is about 12~16 cm and the diameter is between 10~16 mm. It is small in size and light. It does not require martial arts,the basics can be mastered by ordinary people after a short period of study.