PETZL KNEE ASCENT CLIPKnee ascender assembly with connector for boot, facilitating single rope ascents, for tree care The KNEE ASCENT CLIP assembly facilitates the arborist's ascent when using the ZIGZAG or ZIGZAG PLUS mechanical Prusik on a single rope. It contains an upper strap, a CROLL L rope clamp, a lower strap with connector that attaches to the sewn webbing on the top of the arborist's boot, and an XS size TOOLBAG tool pouch. The system is entirely adjustable and