CHINESE THUMBSCREWS AB: LEFT GRAB TO RIGHT WRIST

Defense A:

1. Left hand grabs attacker right hand from the top and pins thumb as your right foot steps across to 10:30.
2. Twist the attacker’s wrist as you apply pressure against the thumb, breaking it.

Defense B:

1. Your left hand grabs the attacker’s wrist from the inside of his arm.
2. Push the thumb forward to break the thumb.