Safety five-lobed knobs EN 5337.9 were designed to prevent unauthorized use.
To engage and release, the key must be inserted and turned by 180°, creating a formlock between the knob and the tapped insert. Turning the key back by 180° will release the connection.
The key can be inserted and pulled off in both end positions. Two keys per knob are included.
Resistant to solvents, oils, grease and other chemical agents.