The ZIGZAG mechanical Prusik allows you to move efficiently in the tree, while maintaining the gestures specific to the classic Prusik pulley system. The locking chain provides precision and fluidity in movement. The pulley, mounted on sealed ball bearings, makes it easy to take up the slack. Use on double rope and single rope gives it excellent versatility. The lower connection hole is fixed to guarantee the alignment of the device in the axis of the worker and to optimize the grip.