Is operated by pulling a hand chain and moving along the lower edge of an I beam.
When used in conjunction with chain blocks, they can create various configurations like a bridge crane, a single beam crane, or a cantilever crane.
These trolleys find extensive applications in factories, mines, docks, warehouses, and construction sites for tasks such as machinery and equipment installation, as well as lifting and transporting goods.
Their portability is especially beneficial for outdoor lifting operations where access to electrical power is limited.