Cunyuer 4KN Climbing Pulley, Rope Roller, Rappelling Equipment for for 8-12MM Rope Climbing Pulley

["HEAVY-DUTY ROPE ROLLER: Designed for 8-12mm ropes, this heavy-duty rope roller features a robust 7075 aviation aluminum construction with a 4KN load capacity (approx. 400kg/881lbs), ideal for demanding climbing and rigging tasks","EFFORTLESS RAPPELING EQUIPMENT: Spring-assisted mechanism enables smooth working for efficient rope control during descents. The ball-bearing structure ensures quick rotation with minimal friction","VERSATILE LOCKING PULLEY:Good for mountaineering, rescue works (25KN static tension), and aerial work. Safety-certified locking mechanism supports heavy loads up to 12.5KN rolling force","PREMIUM PULLEY ENGINEERING: Machined from aviation-grade aluminum with mirror polish outside. Reduced friction design maintains mechanical efficiency","PERFORMANCE SPECS: Pull force: 4KN (about 400KG),Applicable rope diameter: 8-12mm, Pulley type: ball bearing structure, The static tension of the pulley: 25KN, Rolling force: 12.5KN, Lifting force: 4KN"]