General description
This Yale 89DMGPB Deadlock Nightlatch features a hardened case finish in Dark Metallic Grey and a polished brass cylinder. It is one of the most widely-used front door latches, providing reliable security with a high security rating. The lock is key operated from the outside and lever handle operated from the inside, ensuring ease of use while maintaining safety.Technical specifications
Installation
The Yale 89 series nightlatch is designed for easy installation on standard front doors. Ensure the backset measurement aligns with your door specifications for optimal fit.Usage
The latch automatically deadlocks when the door is closed, and the snib function allows the latch to be held back. Additionally, the inside handle can be deadlocked by a reverse turn of the key in the cylinder, providing extra security. When deadlocked in this manner, the latch cannot be opened from the inside, only from the outside with the key.Other information
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