Harken - Ninja 2.0 Foot Ascender

The Harken Ninja 2.0 is a foot ascender developed for efficient rope access, rescue and arborist work. Its symmetrical dual-cam system grips the rope from both sides, keeping it correctly aligned and allowing each cam to use a lighter spring force. This creates a low-drag rope path that feeds smoothly from the start of an ascent without requiring slack to be pulled through by hand.

A spring-loaded retainer and raised side plates keep the rope within the fairlead during climbing, reducing accidental kick-out while still allowing deliberate removal. Transverse ribs on the stainless-steel cams distribute pressure across the rope sheath without relying on aggressive teeth, helping to limit wear. The ambidextrous body can be fitted to either foot, while the adjustable strap is removable for cleaning or replacement.