This equipment is widely used for non-destructive handling of various plates(Especially aluminum plate).
No need to install, the sucker ring can be directly connected with the crane hook.
No need for any control buttons, no need for any external power.
Rely on the slack and tension of the chain to control the vacuum generation and release.
Since there is no need for external wires or air pipes,there will be no misoperation, so the safety is extremely high.