The Anaconda Vice is done from a position in which the wrestler and the opponent are seated on the mat facing each other. The wrestler sits on one side of the opponent and using his near arm encircles the opponent in a headlock position and grabs the opponent's near wrist, bending the arm upwards. Then, the wrestler maneuvers his/her other arm through the "hole" created by the opponent's bent wrist, locks his/her hand upon his/her own wrist, and then pulls the opponent forward, causing pressure on the opponent's arm and neck.
It can also be spelled as Anaconda Vise and its technical name is Arm-Trap Triangle Choke.