Premium Material: Made of 304 stainless steel, rust and wear resistant with strong structure, made by strict process, reliable and durable.360 Degree Flexible Swivel: 360 degree swivel top ring for easy rope handling, prevents rope knotting, easy to use, smooth roller provides excellent rope traversal.Small size & large capacity: Size: M15; Wheel Diameter: 15mm/0.59; Wheel Width: 6mm/0.23; Rotary Ring Width: 11mm/0.43; Total Length: 60mm/2.36; Maximum load: 35kg / 77lbs. What a simple yet powerful roller.Wide Applications: Flexible sliding pulley with strong load capacity for wide applications. Gravity and slip use for lifting, transmission or pulling work, designed for use with a rope or a drawstring inside and outside with a smooth sliding function.Package Included: 6pcs x M15 Single Pulley