This mortise lock is constructed of steel components with rounded faceplate ends. It features an adjustable, spring-loaded hook latch projection, and it can be used on sliding patio doors constructed of wood, aluminum and vinyl. This lock works with mortise style, surface-mounted patio door handle sets with 45° angled keyway positions when in the locked position. The mounting hole centers of this lock measures 3-11/16 in. from center to center, and the rear housing corners are square. This mortise lock is used by many patio door manufacturers. Selection Tip: To ensure the perfect match is selected prior to purchasing, the lock will need to be removed to compare the following 4 features (besides the width of housing): The distance of the mounting holes measured from center to center, The faceplate ends; rounded or square, The position of the slotted keyway when in the locked position; at 45° angle or vertical, and the shape of the housing corners at the rear; square or slanted. Installation Tip: Watch the manufacturer's How-To Video that is linked to this item page.

• Replace old or broken door locks: when your sliding door mortise lock is broken or old, don’t replace the door entirely, just get a new mortise door lock
• For sliding doors: this mortise lock replacement can be used on sliding patio doors constructed of wood, aluminum and vinyl, and fits on W and F manufactured handles
• Vertical degree keyway: this E 20143 mortise lock has a vertical keyway position when in the locked position
• Strong and durable: this patio door mortise lock set is constructed of a steel housing and faceplate
• Dimensions: the mounting holes of the mortise latch are spaced apart at 3-11/16 in. on center; for all dimensional information please refer to the line art and compare to your needs before purchasing
• Note - please refer to the line art drawing for dimensions and compare with your needs before purchasing (not universal)