Its working principle is based on a gear reduction mechanism and a self-locking braking system. You can think of it as a power amplifier:

· Labor-saving principle: The hand crank drives a small gear, and the small gear drives a large gear connected to the drum. This combination of large and small gears forms a strong mechanical gain system. Therefore, even if a person exerts a few kilograms of force on the handle, a tensile force of up to hundreds of kilograms can be generated on the wire rope. · Safe self-locking: Most hand winches are equipped with ratchet pawls or automatic load-holding brakes. When you stop shaking, the brakes will automatically lock immediately to prevent heavy objects from slipping and ensure safety.