https://aiwins.wiki/wiki/15_Up....AndComing_Replacemen
Security Features of Double Glazed Windows Unlike old wooden frames, modern double-glazed windows are equipped with security features that make it difficult for burglars to open windows. They include robust locking mechanisms and top-quality handles. Espag handles are equipped with an auxiliary spindle in the back of the handle which controls the multi-point lock within the window frame. They are extremely popular on uPVC windows. They are available in cranked and straight versions. High-Tec
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