National Hardware's 3/8" Stainless Steel Marine Grade Anchor Shackle is designed for use in marine, industrial and construction applications. Manufactured from stainless steel for durability. Easily installs with included removable 15/32" screw pin. Anchor shackles are designed for multi-dimensional pulling applications which can be used to attach on hoists, clamps, slings and other lifting equipment. Meet federal specifications RR-C-271D, Type IV, Class 2. Heavy Duty Rating with 2,200 lbs.Safe Working Load, always follow safe working load (SWL) limits included on packaging. National Hardware's Lifespan Limited Lifetime Warranty.