This particular leglock has its foundation in the Russian Martial Art Sambo. What’s makes this move effective is that it takes very little effort to put your self in a position to execute this technique. The BJJ Sambo Leglock works because it applies pressure on the knee, which causes the tap. However the Sambo Leglock does not always work on everyone. Therefore this techniques effectiveness is dependant on your opposition’s flexibility. Utilisation of this technique in MMA can be usefull.