Both chain hoists and lever hoists are common manual lifting tools, but they have significant structural and working principle differences. Working Principle: Chain Hoist - Power source: The weight is lifted by pulling the hand chain (looped chain) vertically to drive the internal gear mechanism, which in turn lifts or lowers the load with the lifting chain. Operation method: The operator stands on the ground or a fixed position and pulls down the hand chain, causing the load to rise or fall accordingly. Lever Hoist - Power source: The load is moved by manually turning the handle (lever) to drive the internal gears or ratchet mechanisms, which then move the steel wire rope or chain. Operation method: The operator needs to repeatedly turn the handle (similar to the action of levering), achieving the lifting or traction of the load through mechanical transmission.