1.Prevent unauthorized operation of the main gas cylinder valve.
2.Needless to require that the various diameters and threads of the lock and the gas cylinder cover completely match with each other
3.Suitable for neck rings with a diameter of 8.9cm at the max.
4.Installation can be finished in a few seconds,the LOTO procedure can be finished easily and quickly
5.Suitable for 0.8cm – 4.5cm valves.