Latch.Deadlock.Snib Button.Genuine Yale Traditional Nightlatch.

Internal snib button is used to engage the deadlock or temporarily hold back the latch bolt. Functionality: It features a latch that can be deadlocked for added security or held back using a snib button for temporary disengagement. Suitability: Designed for inward-opening doors, compatible with both left and right-handed configurations. Components: Typically includes an internal nightlatch mechanism, a strike plate for the door frame, and an external rim cylinder operated by a key.