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The DON-JO EL175DU is a full lip strike plate designed for use with mortise and cylindrical locksets in commercial and residential door applications. The strike features a 2-1/4 inch full lip and a 1-3/4 inch extended lip, providing extended door frame coverage that helps protect the frame from latch bolt wear over time. Finished in dark bronze, the EL175DU is suited for installations where a consistent, low-sheen metal finish is specified. Door hardware installers and locksmiths are the primary trades that handle this component during new construction and retrofit work.
This strike plate is used in standard door frame installations where a full lip strike is required to accommodate offset or thick-framed doors. The extended lip design is commonly specified on doors where the stop molding or frame profile requires additional latch engagement depth. It is sold individually and is well-suited for both single-unit service calls and larger door hardware projects where case quantities of 10 are practical.
Designed as an OEM-style replacement or new-installation strike for standard door frames requiring a full lip strike plate with an extended lip profile.
Installation is typically performed by a licensed locksmith or door hardware installer. Before installing, ensure the door and frame are properly aligned and the latch bolt throw is confirmed. Use a chisel and router to mortise the strike recess to the correct depth before fastening. Fastener selection should be appropriate for the frame material and door thickness to ensure secure retention.
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