This action is launched from binding below and on the left. First, it is neccesary to get closer into grappling distance, most probably by switching into priest's special longpoint.
If you are in grappling distance in priest's special longpoint, you can wrap both the opponent's arms by your shield arm. This takes control over both the opponent's hands, while leaving your sword hand free and ready to hit. It is also possible (even though worse) to grab just sword hand of the opponent. This leaves the opponent's shield free, but it is better than nothing.
This action is covered by by play 3 and play 13
It should be noted, that this action can be defended by getting my arms to the outer side, and by checking his shield with my schiltslack make sure that he will not be able to wrap his shield arm over my arms. This is shown in first krucke play