https://blogfreely.net/corncoc....oa7/10-upvc-windows-
Security Features of Double Glazed Windows Contrary to old wooden frames modern double-glazed windows are equipped with security features to make it difficult for burglars to break into them. These include sturdy locking mechanisms as well as high-quality handles. Espag handles have a spindle on the back that triggers a multi-point lock on the window frame. These handles are very popular on uPVC windows. They are available in cranked and straight versions. High-Tech Locking Mechanisms Window locks are
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