Prime-Line F 2666 Sash Lock for Vertical and Horizontal Sliding Windows &ndash; Universal Window Sash Lock to Replace Broken Locks for Additional Home Security, 2-1/4&rdquo; Mounting Hole Centers, White WINDOW SASH LOCK  This window sash lock includes one cam-action latch with fasteners, and can be used on a wide variety of sliding windows. The lock does not use a separate keeper, instead the latch engages the fixed rail to lock the window REPLACEMENT PART  Use this window sash lock to replace old or broken window locks to maintain security in your home EASY INSTALLATION  Installation is quick and easy, and the sash lock can be used on vertical single and double hung aluminum-sliding windows, in addition to horizontal aluminum sliding windows ECO-FRIENDLY  This sash lock is made of a vinyl composite material and features an eco-friendly design SIZING - This sash lock has 2-1/4 mounting hole centers with a 3/8 latch projection that engages into the fixed rail of the top sash