General description
This Yale 89 series deadlocking nightlatch is a widely-used front door lock designed for high security. It features a polished chrome finish with a hardened case for durability and a high-security rating. The lock is key-operated from the outside and lever handle operated from the inside, making it convenient for everyday use. The latch automatically deadlocks when the door is closed, and a snib function allows the latch to be held back for ventilation or passage. The inside handle can also be deadlocked by turning the key in the cylinder, preventing the latch from being opened from the inside.Technical specifications
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