The HZ-lock comprises a main lock, level with the door handle and upper and lower additional deadbolts. The main lock and additional bolts are connected by hardened bars that are integrated onto the front plate of the lock. Opening of the door occurs by the door handles on either side of the leaf.
Normally, the outside door handle is uncoupled from the lock mechanism and can be actuated only in idle motion. The inner door handle is permanently connected with the lock mechanism.Any electronic access control system can switch the outside handle from idling to operation via the built-in magnetic coil. The three bolts and the latch are withdrawn by lowering either the inner door handle or the coupled outside door handle. The bolts function in a variable zoom sliding movement and remain in each withdrawn position, even if in case of a broad clearance, they need not be withdrawn completely for slewing the door leaf. In case of a power cut or for emergency opening, the outside door handle can be engaged by way of the cylinder and key.