GLADIATOR LOCK AND HARDWARE: The door is equipped with a unique 4-way lock (model RB507 or RB606), with four 10 mm (0.393″)/18 mm (0.709″) front bolts. The lock also activates upper and rear 13 mm (0.511″) bolts. Unique hook mechanisms, located above and below the main lock, and 2 fixed hook bolts in the hinge side attach the door leaf to the frame providing a high security structure. • The high security RB cylinder- Supplied with an advanced cylinder protector for prevention of picking and drilling, and forcing of the lock cylinder. When in the locked position, multi-angled locking is achieved. As each bolt is independent, forcing of one bolt will not affect the others, and pushing or applying pressure to a bolt head will not cause the lock system to open.