National Hardware’s 18 Stainless Steel Quick Link provides a fast, secure connection between chain and chain accessories Manufactured from stainless steel for durability Installs quickly using a hex shaped bolt that easily opens and closes with an adjustable wrench Quick Links should be used with chain or other items with equal or lower working load limits Coated with WeatherGuard Protection to withstand harsh weather conditions and prevent corrosion Medium Duty Rating with 300 lbs Safe Working Load, always follow safe working load SWL limits included on packaging National Hardware’s Lifespan Limited