Hardened steel locking bolt: 5mm for the Trigger Alarm 345 and 9.5mm for the Trigger Alarm 350. Easy handling due to the push down cylinder where the bolt is moved in the locking process automatically. Bolt, lock body, as well as supporting elements of the locking mechanism, are made of special hardened steel. A vibration detection system, detects every impact attack. Lock can be transported in locked condition without activating detection system thanks to an on/off key position. Different acoustic signals inform you about battery, activation and alarm status. Premium cylinder for high protection against manipulations and picking.