The ZIGZAG mechanical Prusik allows the user to move around efficiently in a tree using classic Prusik pulley system technique.The linked rings provide precision and fluidity when moving around.The pulley is mounted on ball bearings to allow the slack to be taken up easily. The device is released by simply pressing on the release lever. When the lever is released,the device jams again. Varying the pressure on this lever controls the speed of the descent. The pulley is mounted on sealed ball bearings to allow the rope to be taken up easily.