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Maintain home security and replace old or broken window locks with this window sash lock. 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, without the use of a separate keeper. It is made of diecast zinc with a painted white finish. It’s strong, durable and made to last. Installation is quick and easy and the sash lock can be used on vertical, single and double hung aluminum sliding windows. These locks will also fit some horizontal, aluminum-framed sliding windows.