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The YG series hook blocks were developed to provide the market with more reliable technology and more hoisting performance. Overall design adopted, which could minimize the connection distance between hook and travelling block. This kind of design will be more suit for top drive type of rigs. Material for load components is high strength alloy steel, and the quality is controlled by NDT. Grooving are treated with quenching, which it will be more wear-resisting and long life. Included but not limited by the advantages mentioned, YG series of hook blocks might be your best choice.