The Petzl Croll Ascender is a simple rope clamp designed to help climbers and cavers make controlled upward progress on a fixed line. It attaches to your rope and acts as a secure point that moves smoothly as you ascend, reducing fatigue and improving safety on steep sections.
Weighing just 115 g, this ascender adds minimal load to your harness, making it easier to carry on long approaches or vertical passages. Its slim profile (60 × 14 × 5 cm) fits neatly alongside other gear and won’t snag as you move, keeping your setup tidy and efficient.