1. Premium Material: Made of 304 stainless steel for durability, rust resistance, wear resistance, and corrosion resistance with high strength structure. 2. 360 Degree Swivel Bushing: Includes 4 pieces of M25 single pulley block with a smooth spinning wheel, enabling 360-degree rotation to help prevent rope, cable, or wire from tangling. 3. Compact Design with High Load Capacity: Stainless steel wheel size: 25mm x 11mm (D x W), eye diameter: 15mm, total height: 85mm. Maximum load capacity: 150 kg. Offers flexible sliding performance with high strength. 4. Versatile Indoor and Outdoor Use: Compatible with various ropes or cords for flexible operation. Suitable for applications in garages, factories, construction, shipping, mining, households, and more. Ideal for use with kayaks, canoes, curtains, clotheslines, dog runs, and machine loading systems. 5. Package Includes: 4 x M25 Single Pulley Blocks