https://www.openlearning.com/u..../gadekorsholm-sl7mnw
Security Features of Double Glazed Windows Unlike old wooden frames, modern double-glazed windows come with security features that make it difficult for burglars to open them. These include high-quality handles as well as sturdy locking mechanisms. Espag handles have a spindle on the back of the handle that is responsible for the multi-point lock inside the window frame. They are popular on contemporary uPVC windows and come in cranked or straight variations. High-Tech Locki
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