Security features: Steel housing painted red the key is quickly at hand by smashing the glass pane Special features: the model is also available with a clapper Further information: 1 hook Mounting material is included in the scope of delivery Cylinder lock/2 keys With the emergency key box NS1;from Rottner Tresor, you or emergency services such as rescue services, fire brigade, police always have the most important key to hand in an emergency. emergency services such as rescue services, fire brigade, police, always have the most important key to hand in an emergency. The pane is smashed in an emergency and the key can be removed. Two keys are supplied for the cylinder lock. The installation material is included in the scope of delivery. The glass pane can be replaced so that the emergency key box is ready for use again.