Petzl | D022EA00 – Knee Ascent Clip Knee Ascender

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SKU: D022EA00

Petzl’s Knee Ascent Clip is an assembly with a connection point for boots, allowing for single rope ascents, for use with a ZIGZAG or ZIGZAG PLUS Mechanical Prusik on a single rope. Featuring an upper and lower strap with a connector for the arborist’s boots, as well as a Petzl CROLL L rope clamp with integrated thumb catch and XS size Petzl TOOLBAG pouch. The system is easy to install and remove thanks to a series of connectors and buckles and the included pouch makes for a climber that’s always prepared. All aspects of the system are  adjustable for adaptation to climbers and jobs of any shape or size.

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  • Material(s): aluminum, steel, nylon, polyester
  • Weight: 285 g
  • Min. rope diameter: 8 mm
  • Max. rope diameter: 13 mm
  • Rope compatibility: EN 1891 type A low stretch kernmantel ropes


Above all, referring to the detailed list of instructions and warnings for this product is extremely important, as the user accepts all responsibility for the information therein. Failure to follow these warnings can result in severe injury or death. Activities involving the use of this equipment are inherently dangerous, and the use is assuming the responsibility to obtain the necessary training from qualified and competent instructors and understanding the symbols, terms, and instructions for inspection before use.

They can be found in the following document: PDF

The Petzl Knee Ascent Clip is a component of a set of Mechanical Prusiks designed and manufactured by Petzl. Mechanical Prusiks are a replacement for Prusik knots traditionally used by arborists and climbers to control the length of the rope and their place on it, allowing the user to move around efficiently in a tree. These devices allow for greater control and precision while climbing, moving from the center to the end of branches, switching from ascending to descending, and moving across the tree by swinging (pendulums). These systems are easy to use, functioning very similarly to classic Prusik arrangements, and granting the user smooth, reliable movement up and down the rope. Friction in Petzl ZIGZAG systems is introduced and controlled by the recognizable chain of links through which the rope runs, making for intuitive and simple braking that can be controlled with precision. Along with the strap itself, the Knee Ascent Clip comes with a Petzl CROLL L Rope Clamp, a ventral rope clamp with a pinch opening, toothed cam and stainless steel construction for reliability in all conditions.

Additional information

Weight 2 lbs
Dimensions 10 × 10 × 10 in


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