Wrist locks are the most useful techniques in subduing your opponent. Often you may encounter situations in which you cannot throw kicks or punches at all but you must take the other party under control. Wrist manipulation is one of the ultimate methods in subduing and controlling locks. Since the wrist is full of vital points, once you know how to do the techniques properly, you can take complete control of attackers without causing permanent damage. Wrist locks are especially good for law enforcement officers.
There are four ways of controlling the wrist: straight, reverse, lateral, and hooking angles. There are four ways of controlling the direction of you and your opponent’s movement: forward, backward, lateral, and spiral paths. Whether you manipulate the wrist in a standing position or on the ground, you can apply the same principles to subdue your opponent.
You need to develop strength of your thumb and fingers along with your forearm muscles in order to be effective. You can develop them by specific training methods such as weight training and sand bag pressing.
If you want to learn wrist lock techniques, the Wrist & Arresting Locks video contains techniques from the most basic grip to advanced techniques such as arm bar, wing twist, pinion on the ground to immobilizing the opponent completely. Sang H. Kim explains every step of the training very thoroughly.