Hand chain hoists are divided into fixed types, also known as hook-type, which can be used directly by hanging them on a fixed point. There is also the combined type, which is a combination of hand chain hoist and manual rail car, suitable for installation on I-beams. Hand chain hoists are used in factories, construction sites, docks, shipyards, warehouses, etc., for installing machinery and lifting goods, especially for outdoor and powerless operations. The combined type hand chain hoist refers to the use in conjunction with a manual single-rail trolley. The upper part of the hand chain hoist combines with the single-rail trolley, making it suitable for use in low clearances and limited spaces. The clamp width of the manual single-rail trolley is adjustable according to different models of I-beams through shims. It comes in multiple tonnage specifications and chain lengths, which can be selected based on actual usage conditions.