Of course. The bidirectional self-locking manual winch of manual winch and small crane can be changed to unidirectional. The so-called two-way self-locking means that the manual winch can brake whether it rotates forward or backward, that is, when we pull something up and pull it into the air, the heavy object will not fall, but will be suspended in the air under the self-locking of the manual winch. When the operator rotates the handle clockwise, the internal ratchet will rotate clockwise. Once the handle stops, the ratchet and pawl will interact and produce a self-locking reaction. So does turning the handle counterclockwise. The function of this ratchet mechanism is to prevent the winch from producing reverse reaction force, so that the heavy object is still in its original place, thus ensuring safe lifting.