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The EMTEK LC4-DLB275R-US3 is a key-in lever or knob deadlatch designed for residential and light commercial door hardware applications. It features a 2.75-inch backset with a 0.25-inch radius corner faceplate and ships in a Polished Brass Lifetime finish. This deadlatch is a spring-latch style bolt mechanism that retracts when the lever or knob is turned and is compatible with key-in entry locksets. It is installed by locksmiths, carpenters, and general contractors during new construction or door hardware replacement work.
This deadlatch is suited for interior and exterior residential door applications where a key-in lever or knob entry function is required. The 2.75-inch backset is a standard dimension compatible with most pre-bored residential door preparations. The radius corner faceplate fits the most common mortise pocket profile found in residential passage and entry doors. No specific compatible lockset families are named in the available product data.
Designed as a replacement or new-installation deadlatch for key-in lever or knob locksets requiring a 2.75-inch backset and a 0.25-inch radius corner faceplate profile.
Installation should be performed by a licensed locksmith or qualified carpenter familiar with ANSI door preparation standards. Ensure the door is fully closed and the lockset is disassembled before replacing the latch bolt. Verify the backset measurement from the door edge to the center of the bore hole before installing. Confirm faceplate corner profile matches the existing mortise pocket to avoid additional chiseling.
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