The bidirectional self-locking hand winch is a type of manual lifting tool that can be used for towing and lifting objects up and down.  Usage Recommendations: - Safety:Do not exceed the rated safe working load. Ensure that the winch is securely installed before use. - Regular Inspection:Frequently check the steel wire rope for signs of wear, broken strands, or rust. Also, verify that the self-locking and braking functions are working properly and reliably. - Maintenance:Clean up any dust and debris immediately after use. If necessary, apply a small amount of lubricant to the moving parts to ensure smooth operation.