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1, 80 grade clay hook 2, material: alloy steel 3, surface treatment: powder-coated 4,breaking pull tensile is 4 times that of working force 5. High-strength high toughness special alloy steel forging, and passed through heat treatment.6, use the 80-level chain 7, strict sampling test for each batch of products 8, each product is equipped with a casting insurance tongue.