This series of products are mainly used for unloading and towing heavy objects. It has the advantages of small size, good performance, safety and reliability. It can be used with tower cranes, and can also be used alone in construction sites, factories and mines, transportation, warehouses and docks. It is necessary equipment for lifting heavy objects. 　　 This series of winches is divided into two types: single drum fast speed and single drum speed regulation. The fast winch adopts a single-speed motor. The speed-regulating winch adopts a pole-changing multi-speed motor. The braking device is normally closed, divided into electromagnetic braking and hydraulic braking, safe and reliable