A lever hoist, also known as a lever block or a ratchet lever hoist, is a type of mechanical lifting device that is used to lift and move heavy loads. It is typically used in situations where a manual lifting device is needed and where electric or hydraulic options are not available or practical.

A lever hoist consists of a lever handle that is used to operate a ratchet and pawl mechanism, which allows the hoist to lift and lower loads with precision and control. The lever handle is attached to a chain or wire rope that is wound around a drum inside the hoist body. When the lever is pulled, the ratchet and pawl mechanism engages, allowing the drum to rotate and the chain or wire rope to be lifted or lowered.

Lever hoists are commonly used in construction, manufacturing, mining, and other industries where heavy loads need to be lifted and moved. They are designed to be compact, durable, and easy to use, and can be operated by one person. They come in a range of sizes and lifting capacities, so it's important to choose the right hoist for the job based on the weight of the load that needs to be lifted.