hOpen Now
Narrow By

Ascenders & Descenders

Mechanical ascenders are popular with professional arborists using rope techniques and recreational climbers as well. And on this page, you'll find all the names that you trust. Petzl, CMI and Kong are all represented here! We have standard handled ascenders for use with SRT (single rope technique) systems, including the Petzl Ascension Left and the Petzl Ascension Right. For those using a dual rope system, we offer the Kong Trender Twin Ascender or the CMI Expedition Twin Ascender, which is uniquely designed to allow one-handed use on a DdRT system.

Use the filters at left
to find the ascender, descender or modern friction device you've been looking for!

Self-braking mechanical descenders such as the Petzl Rig (for up to 7/16" rope) or the Petzl I'D L (for up to 1/2" rope), allow users to maintain a nice, smooth rate of descent and establish a working position quickly and easily. However, such devices are expensive and some users prefer a simpler, more economical approach, such as a Figure 8. When properly tied in, Figure 8's apply friction to the rope and allow the user to control his or her rate of descent. They are simple, affordable and effective, but not self-braking or "anti panic".

Friction Devices
Over the last few years, there have been several new friction devices brought to the market, and they have been met with a very warm welcome. Devices such as the Petzl ZigZag Plus or the Rock Exotica Unicender allow the user to move around efficiently in a tree using classic Prusik pulley system technique. The friction chain provides precision and fluidity when moving, and you end up with one slick device that allows you to ascend, descend and position with greater control and ease.

Petzl Croll S Chest Ascender / Rope Clamp - #B16BAA

Petzl Croll L Chest Ascender / Rope Clamp - #B016AA00

CT Quick-Step Foot Ascender - Left

CT Quick-Step Foot Ascender - Right

CMI Foot Ascender - Left - #FTASC-L

CMI Foot Ascender - Right - #FTASC-R

Kong Futura Foot Ascender - Left

Kong Futura Foot Ascender - Right

Petzl Pantin Foot Ascender - Left - #B02CLA

Petzl Pantin Foot Ascender - Right - #B02CRA

CMI Expedition Ascender - Left - #EXPASC-L

CMI Expedition Ascender - Right - #EXPASC-R

CMI Large Ultrascender - Left - #ULT01R-L

CMI Large Ultrascender - Right - #ULT01R-R

Kong Lift Ascender - Left

Kong Lift Ascender - Right

Petzl Ascension Ascender - Left - #B17ALA

Petzl Ascension Ascender - Right - #B17ARA

CMI Expedition Twin Ascender - #EXPTWIN

CMI Expedition Double Ascender - #EXPDOUBLE

Petzl Ascentree Double Ascender - #B19AAA

Petzl Footape Ascender Strap - #C47A

Petzl Footcord Ascender Strap - #C48A

Weaver Foot Ascender Strap - #08-98105

Weaver HAAS Velox Ascent System - Regular - #08-98110

Petzl Knee Ascent Loop Kit - #D022DA00

USR Figure 8 Aluminum Descender

CMI Figure 8 Aluminum Descender - #R800

USR Rescue 8 Aluminum Descender

Fusion Rescue 8 Aluminum Descender

Climb Right Rescue 8 Aluminum Descender

CMI Rescue 8 Aluminum Descender - #R1000

USR Rescue 8 Stainless Steel Descender

Petzl PIRANA Descender - #D005AA00

Petzl GRIGRI Gray Descender - #D014BA00

Petzl Rig Descender - #D021AA00

Petzl I'D S Descender - #D020AA00

Petzl I'D L Descender - #D020BA00

Petzl I'D EVAC Descender - #D020CA00

ISC D4 Work / Rescue Descender - #RP880

ISC D5 Work / Rescue Descender - #RP885

Petzl MAESTRO S Descender - #D024AA00

Petzl MAESTRO L Descender - #D024BA00

ISC ZK-2 Singing Tree Rope Wrench - #RP280

Petzl ZigZag Mechanical Prusik Device - #D022AA00

Petzl ZigZag Plus Mechanical Prusik Device - #D022BA00

Petzl Chicane Handled Brake for ZigZag Mechanical Prusik - #D022CA00

Notch Rope Runner Pro - #53420

Rock Exotica Akimbo Mechanical Friction Device - #RG80

Rock Exotica Unicender Arborist Tool - #RG50