If it is a massage, use a toothbrush handle instead!
If it is a martial arts equipment, you can buy iron chopsticks, judge pens, Emei thorns, acupuncture points...
If it is for self-defense, you can use keys, Chopsticks, pens, ballpoint pens....
If you use your body to defend yourself, you can use the golden needle finger (index finger), golden scissor finger (the two index and middle fingers come out together), and the crane's beak finger (press up and down with the middle finger and thumb). Tightening the middle finger), Fengyan fist (protruding the second joint of the index finger), etc. You can also use the tip of your elbow or toes to tap acupoints.
Additional answer:
It is available on Taobao, search for it yourself.