US Screw Pin Anchor Shackle: Material:die forging 45# steel Surface: galvanized, hot dip Application field: aviation,oil US Screw Pin Anchor Shackle:Material:die forging 45# steelSurface: galvanized, hot dipApplication field: aviation, oil, voyageSize: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8", 1-1/2", 1-3/4", 2", 2-1/2" US Screw Pin Anchor Shackle