Durable MaterialIt is made of 304 stainless steel, durable, anti-rust, wear-resistance and highly strong structure. Solid and sturdy design, high loading capacity and swiveling flexibly. Labor-saving DesignErgonomic design, fixed top for easily rope handling, smooth roller provides pretty good rope traverse, pulley rotation cylinder head is solid, durable, 360 degrees rotation to prevent rope from knotting. Strong Load CapacityFlexible sliding pulley with heavy load capacity, the safe loading capacity is 75kg/165lb. Wide ApplicationFlexible sliding pulley with heavy load capacity for numerous application, is workable with rope or cord indoor and outdoor for flexible sliding pulley, easy to install in large kayaks, canoes, factories, construction, shipping, mining, household. It is perfect for Garage, Machine Loading, Curtain, Clothes Line, Dog Pulley System, etc. Package Content12 x crane pulley block