2014 Petzl ZigZag due this week
Richard Tregoweth, Wednesday, January 22, 2014
PETZL ZIGZAG Mechanical Prusik for arborists from Petzl Professional on Vimeo.
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 ..