1, double braking system, more safe and reliable.

2. High efficiency, light motor, non-asbestos braking system, low power consumption.

3, stamped steel body, lightweight and durable, corrosion resistant, corrosion resistant, greatly extend the service life.

4, lightweight, beautiful and durable canvas chain bag, convenient storage chain.

5, with a limit switch device, when the limit is reached, it will automatically stop working to prevent the danger of the circuit.