Hapkido's wrist and ankle locks. Old. 

I took some parts of a VERY long, very old, apparently pre UFC 1/BJJ era Hapkido instructional covering a bunch of things from white to black belt.
Their curriculum is very extensive and has a bit of everything but here i got only some of the wrist and ankle locks i believe could work in a real fight, with some adjustments. To be fair and with all due respect to hapkido practitioners, you can find refined techniques in today's BJJ, but it is good to compare them for educational purposes. I actually think hapkido must have evolved since.