Petzl ASCENTREE Double-Handled Ascender

The Petzl ASCENTREE is a double-handled ascender designed for tree care, giving you two grip positions so you can push and pull more efficiently on long ascents. It is a common choice for climbers building a fast SRT ascent system.

Why two handles help

On a long SRT ascent, your hands and forearms usually give out before your legs. A double handle lets you change grip, push with both hands, and keep the device square on the rope, which smooths out the stroke and saves energy.

The ASCENTREE is often run as the upper device in a rope-walking or frog-style system, with a foot ascender below. That setup puts most of the work in your legs and gets you into the canopy quickly.

Because it is built for tree work, the ASCENTREE is meant to sit well in a climber's system rather than a caver's or rope-access setup. Many climbers like it for long access climbs on big trees where a single handle wears their grip out.

Setup and safety

Check Petzl's instructions for compatible rope diameters and approved configurations, and keep the device connected to your saddle with a suitable tether. Compare other options in ascent and descent gear.

An ascender is not a descent device. Have your descent and changeover worked out before you leave the ground, practice low, and inspect the cams for wear and debris. Life-support gear must meet the applicable standard, follow ANSI Z133 and the manufacturer's instructions, and be inspected before every climb. Get trained before you rely on it.

Keep the cams clean of sap and grit, and check the teeth for wear. A worn cam can slip on a muddy or icy rope.