2015 world BJJ and ADCC world champion Claudio Calasans shows us 2 very effective yet simple wrist lock techniques from the closed guard and from the back.
From closed guard:
From the back:
To get more instruction from ADCC and IBJJF World Champ, Claudio Calasans, check out his Giant Killing series where he shows how to defeat bigger opponents by using wristlocks, closed guard attacks and leglocks, available in convenient On Demand and DVD formats. You can get it here at BJJ Fanatics!