High quality material: This swing pulley is made of heavy duty aviation aluminum, lightweight, rustproof, wear resistant. Max breaking strength: 20 kN = 10 kN + 10 kN Durable bearing: Our pulley is installed with a stainless stell bearing, which is smooth when running, and reduces the wear and tear on the rope Easy to use: The side plate is rotatable for ropes and cable to access easily. The top hole is designed for carabiner, hooks, Prusik and slack hitch Universal fit: Accepts cable / rope within a diameter of 0.51" / 13mm. Perfect for rock climbing, tree climbing, hauling, dragging, rescue, aerial work, engineering protection, outdoor exploring Portable & versatile: The palm-sized micro pulley weighs only 3.66 oz, allows easy one-hand operation. The curved side plates close tightly at the top, making it compatibility with most carabiner shapes The Azarxis 20 kN Micro Side Swing Pulley features heavy-duty aviation aluminum construction for lightweight, rustproof durability, with a 20 kN breaking strength. Its smooth stainless steel bearing ensures effortless operation, while the rotatable side plate allows easy rope access. Compatible with 0.51" (13mm) ropes/cables, it's ideal for climbing, arborist work, rescue, and hauling, with a carabiner-friendly top hole for Prusik and hitch tending.