Practicing self-defense techniques by one's self can get a bit tricky when it comes to wrist locks. I came up with the idea to fill a pair of rubber washing up gloves with rice and tie a knot on the ends. A very inexpensive training aid. I find that it helps me with hand gripping and wrist twisting techniques. Also when practicing self-defense techniques. Can also be great for catching and releasing repeatedly with one hand and switching hands also. Helps me to practice finger and thumb holds as well. I have adapted this idea further by putting arms on the hands with the inexpensive cylindrical swimming floatation device. Also added small elbow pads for the elbows. Wrapped stomach and back support material for the forarms. With 1 kilo ankle weights representing the biceps.

when going further you'll build your own grappling dummy. but thats a good thing. any photos?

I don't have photos. This little rice in gloves idea is very simple to make. I also practice Chi-na. So this helps me also with practicing nerve holds as well as wrist locks. Don't take my word for it that it works; make a pair. Then wonder why you didn't make yourself a set before. Thank me later and tell me how you getting on with it.