CHAIN BLOCKS are used for lifting heavy loads vertically and while speed isn't a key requirement, precision is. They can be used safely and easily by just one person, like if a mechanic needs to carefully lower an engine into a vehicle, or if a car needs to be pulled out from a dangerous spot. They are used in factories to lift objects to and from the conveyer belt, and they can be used in construction to lift heavy loads safely to high levels.
The hoist is suspended using a beam clamp or trolley from the top hook and is operated with two chain loops, the lifting chain and the hand chain. The hand chain is wrapped around a wheel that supports the lifting mechanism and when this chain is pulled, the lifting chain then lifts and lowers the load. The object then can be moved easily along with the trolley.