High quality: This product is made of high-quality aviation aluminium material, and it has strong strength and good toughness and provides excellent stability and durability. Easy to use: The double bearing can effectively support the high-speed rotation of the pulley and reduce the coefficient of friction during its movement. Shaft craft: This stainless steel concave disc is suitable for wire ropes and with a smooth surface to minimise wear on the rope. Wide application: This climbing roller is widely used for outdoor exploration, mountaineering, abseiling, rescue, technical protection, aerial work and other activities. Max load capacity: This product of maximum load capacity is up to 30KN and suitable for 13 mm diameter rope or 12 mm cable. If you are a climbing lover, you deserve it.