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Sash locks are critical components in window and door systems, enabling secure closure and improved security. These locks are often used in double-hung windows, sliding windows, and doors to make sure that sashes or panels are tightly shut when the window is closed.   This locks are made to withstand the rigors of daily use and varied weather conditions. They are made of sturdy materials, like metal or high-grade plastic materials. They are available in a range of forms, including cam-action locks, lever locks, and latch locks, enabling them to be customized to fit a variety of window and door styles. A sash lock's principal function is to prevent the illegal opening or movement of a window or door. It typically made up of two components: a latch attached to one sash or door panel and a strike plate attached to the opposing frame. When the latch is engaged, it securely fastens to the striking plate, creating a tight seal while effectively limiting drafts, noise, and undesirable entryways. Many modern sash locks include additional convenience and security features.