... , high quanlityThe HSZchain Block is easily operated by hand chain, it is suitable for use in factories,,mines,farms, ... attached to a trolley of any type as a traveling chain block .It is suitable to monorail overhead conveying system ... in design and in service ate inherent in HS Services chain Block: 1)Safe,reliable in operation with minimummaintenance.2 ... 32.53.75.39.719.4 High Quality HSZ chain hoists