Light solid aluminum alloy shell,high quality motor with low noise,high strength hook is designed with 360-degree flexible rotating structure,high strength and hardness G80 Alloy chain,inverse phase sequence protecting device to control the circuit not to work in case of wiring error in the power supply,Side magnetic braking device to protect the instant brake in case of the power dump.

Waterproof push button is applied. It is light and durable.It is hot forging with perfect strength that is hard to break. The operation safety of the lower hook is ensured by its 360 degrees rotation and safety tongue piece.