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Most door hardware products are design to fit standard door preparation as illustrated on the left. If you have something different, please start with our hardware replacement guide at the link below.
What is a mortise lock?
The most common type of door hardware most folks have is a tubular latch like the image labeled tubular below. Tubular latches fit into a 1" cross bore and are pretty simple to install. Mortise locks, as shown in the graphic, have a larger box that slides into the edge of the door. They have a solid construction and smooth operation and are considered a high end upgrade. The locking mechanism for privacy sets is a turn button below (as shown), rather than a pin in the rosette.
NOTE: Mortise locks require more specialized door preparation. Mortise locks will not fit into doors that are already prepped for standard tubular latches. Please check how your doors are prepped before ordering.
To Order: Choose Mortise Passage or Privacy From the Function Menu?