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FTC NATE Chest Harness and Knee Ascender Kit The FTC NATE Chest Harness and Knee Ascender Kit is a lightweight, ergonomically engineered ascent sys...
CAMP Otto Large Figure of 8 Descender with Wings The CAMP Otto Large Figure of 8 Descender with Wings is a robust aluminium alloy descender designe...
CAMP Turbospur System - Climbing Spike Ascender The CAMP Turbospur System - Climbing Spike Ascender is a specialist climbing aid designed to enable...
CAMP Turbofoot EVO Foot Ascender - Left The CAMP Turbofoot EVO Foot Ascender - Left is a refined progression aid designed to deliver high efficienc...
Arbpro Gemini Knee Magnetic Sling Upgrade Kit The Arbpro Gemini Knee Magnetic Sling Upgrade Kit is designed to enhance the functionality and ease o...
Arbpro Gemini Spurs Loop The Arbpro Gemini Spurs Loop is designed to enhance rope ascent when using Distel climbing spurs. Developed to work with ...
Arbpro Gemini Foot Ascender - Left The Arbpro Gemini Foot Ascender - Left is a lightweight and versatile device designed to support efficient rope ...
Arbpro Gemini Foot Ascender - Right The Arbpro Gemini Foot Ascender - Right is a lightweight and versatile device designed to support efficient rop...
Edelrid Knee Cruiser The Edelrid Knee Cruiser is a dedicated knee ascender system developed to support ergonomic rope ascent in professional climbi...
Edelrid Tree Cruiser Foot Ascender - Left The Edelrid Tree Cruiser Foot Ascender - Left is a specialised foot ascender designed for direct attachme...
Edelrid Tree Cruiser Foot Ascender - Right The Edelrid Tree Cruiser Foot Ascender - Right is a specialised foot ascender designed for direct attach...
Petzl Tibloc The Petzl Tibloc is an extremely compact and lightweight emergency rope clamp designed for situations where a simple, reliable progres...
Petzl Rig Descender The Petzl Rig Descender is a compact self-braking descender designed for experienced rope access professionals who require prec...
Petzl I'D S Descender The Petzl I'D S Descender is a self-braking device designed for work at height and professional rope access applications. Dev...
Petzl I'D L Descender The Petzl I'D L Descender is a self-braking device developed specifically for rescue operations where high loads, controlled ...
Petzl Ascension Hand Ascender Left The Petzl Ascension Hand Ascender Left is designed for efficient and controlled rope ascents during professional...
Petzl Ascentree Double Hand Ascender The Petzl Ascentree Double Hand Ascender is designed specifically for efficient ascents on doubled rope system...
Petzl Knee Ascent Loop Knee Ascender The Petzl Knee Ascent Loop Knee Ascender is a dedicated knee ascender assembly designed to support efficient s...
Petzl Footcord The Petzl Footcord is an adjustable foot loop designed to support efficient rope ascents when used with an ASCENSION or BASIC rope c...
Petzl Footape The Petzl Footape is an adjustable foot loop designed to support efficient rope ascents when used with an ASCENSION or BASIC rope cla...
Ascenders and descenders play a key role in modern arborist climbing systems, helping climbers move efficiently through the canopy while maintaining control and positioning at height. Whether ascending into the tree using stationary rope techniques (SRT), managing movement during work positioning or carrying out controlled descents, these devices can improve efficiency, reduce physical effort and streamline day-to-day climbing operations. Our collection includes professional arborist ascenders, descenders and rope access devices suitable for a wide range of tree climbing applications.
Modern climbing systems often combine multiple devices to create an efficient and versatile setup. Ascenders are primarily used to aid upward movement on the rope, allowing climbers to conserve energy during long ascents. Descenders are designed to provide smooth, controlled movement when descending or repositioning within the canopy. Some devices combine both functions, offering arborists greater flexibility and reducing the amount of equipment required within the system.
When selecting an ascender or descender, it is important to consider rope compatibility, climbing technique and intended use. Different devices are designed for specific rope diameters and climbing methods, while others may be optimised for SRT systems, work positioning or rescue applications. Understanding how a device integrates with the rest of the climbing system is essential for achieving safe and efficient performance.
The best device will depend on the climbing method and the tasks being performed. Arborists who regularly use SRT systems often prioritise efficient rope access and smooth ascent, while those focused on positioning and movement within the canopy may require devices that offer controlled adjustment and easy operation. Weight, ease of use, maintenance requirements and compatibility with existing equipment should all be considered before making a selection.
Ascenders and descenders are typically used alongside climbing ropes, tree climbing harnesses, carabiners and connectors, mechanical friction devices, friction hitches and prusiks and other professional arborist equipment. Ensuring compatibility across the entire climbing system helps maximise performance and user confidence when working at height.
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