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The shackles are forged by alloy steel materials
Safety factor: 1t-25t is 6; more than 25t is 4
A type is screw-type and B type is outside nut type.
The shackle is Light weight, small size, high safety factor, and easy to operate. It is the optimization product.
High-intensity Straight (D) Shackles (American Standard shackle)