... 1.Shell material is alloy steel,strong wear-resisting, safety performance is high 2.Small volume,easy to carry HSZ-KII Series Manual ... of hoisting, lifting weight usually less than 100t. 2. Shell material is high quality alloy steel, firm, wear-resisting, safety performance ... , low wear, anticorrosion of the chain; High strength hook, material is commonly alloy steel, gesture type crane design to ensure ...