ECONOMIC PULLEY BLOCK DESIGN: The fixed pulley is fixed.smooth sliding, high quality nylon card slot design, mute, enjoy the pleasure of movement. HIGH QUALITY: Roller to stainless steel single pulley with high sturdiness, anti-rust, wear and corrosion resistance with very strong structure. CONVENIENCE OF USE: Flexible sliding pulley with high load capacity for long many applications, 300 kg load.WIDE RANGE OF APPLICATIONS: Swivel pulleys can be used with inner and outer rope or cord for flexible sliding pulley. Number of pieces supplied: 1