... steel 2.quenching and tempering 3.2 times deformation testing American-Standard D Shackle G2101.material:alloy steel 2.size:32mm ... rope retainer ,Steel plate clamp ,and other rigging fittings .This company produces the sling is widely used in water conservancy construction ... many years, the company in good faith for this, the first-class service, won the praise of users. American-Standard D Shackle ...