Prime-Line E 2164 Mortise Lock, 4-5/8 inch, Steel, 45 Degree Keyway, Round Faceplate, Spring-Loaded Product Description This mortise lock is constructed of steel components with rounded faceplate ends. It features an adjustable, spring-loaded hook latch projection and an adaptor faceplate which allows for use on wood and vinyl patio doors. This lock works with mortise style, surface-mounted patio door handle sets with 45 degree angled keyway positions when in the locked position. The mounting hole centers of this lock measure 3-11/16 in. and 4-5/8 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): 1) The distance of the mounting holes measured from center to center, 2) The faceplate ends; rounded or square, 3) The position of the slotted keyway when in the locked position; at 45 degree angle or vertical, and 4) 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. From the Manufacturer This mortise lock comes with a brilliant zinc plated finish. Adaptor faceplate allows for use on wood and vinyl patio doors. Comes complete with fasteners for a quick and easy installation. Features All components of these mortise locks are constructed of steel These locks come in a corrosion resistant, zinc plated finish Designed for use with patio sliding doors, and can be used on units constructed of vinyl and wood Features an adjustable faceplate to allow for latch projection adjustment Easy to install with only a few simple tools NOTE: Please review the line art and compare the dimensions to your needs before purchasing USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.