High-strength aluminum alloy, with good wear resistance, not easy to deform, durable and light in texture and The safety switch prevents the main lock of the upper board from falling off, and the upper side board can be quickly opened or closed without opening the main lock, making the operation more convenient just Lower the control handle, thick rubber is added to the handle, it feels comfortable and easy to use
The slow-down speed control module, made by alloy precision, can better control the falling speed when in use and Automatic stop wheel, internal spring is installed to increase friction to stop moreover  Buffer friction wheel, reduce friction temperature and reduce rope loss