Harken Ninja Foot Blocker

Description Harken Ninja Foot Blocker – Dual-Cam Foot Ascender for Arborists The Harken Ninja is an innovative dual-cam foot blocker that distributes ascent thrust more evenly across the rope — delivering a smoother, more comfortable climbing experience while eliminating the sharp teeth that cause rope wear on conventional single-cam designs. Key Features The dual-cam system is the Ninja’s defining feature: two cams work in concert to grip the rope more evenly, reducing point load and eliminating the aggressive teeth found in traditional foot blockers that gradually degrade rope integrity. Accidental rope exit is reliably prevented by the Ninja’s design — removing a common frustration with simpler foot ascenders. The device can be worn on either foot, eliminating the need to purchase separate left and right versions. Compatible with ropes from 8 to 13 mm. Technical Specifications Feature Technical Data Manufacturer Harken Model Ninja Cam system Dual-cam (rope-friendly, no sharp teeth) Rope diameter 8–13 mm Maximum load 1.5 kN Weight 178 g Foot compatibility Either foot (ambidextrous) Recommended use Rope ascent, tree climbing, arboriculture