The jacket is not loaded, only provides protection, and flattened with the inner bearing core to provide a safe and load-bearing grip to provide wear resistance and extend service life. The flexible slings are lightweight, with only 20% of the chain and the same load. Therefore, even if you fall from a high altitude, it will not cause personal injury. Similarly, the shaking on the crane hook does not easily damage the head of the hoisting worker like a conventional lifting tool. Slings do not create sparks in explosive or hazardous environments.