RGL DBGLS150 Electric Fail-Safe Drop Bolt for Glass Doors, 12 V DC, 1000 kg DBGLS150The Drop Bolt Glass Door is designed for robust security and reliable performance. Key features include: Made from durable aluminium for long lasting use. Fail safe operation ensures security even in emergencies. Long lifespan with over 500,000 operations. Auto locking feature with timer settings of 3, 6, or 9 seconds. Suitable for double action in both swinging and out swinging doors. With efficient performance and user friendly features, it is ideal