https://www.repairmywindowsand....doors.co.uk/dartford
Window Friction Hinges A friction hinge has a mechanism built inside that creates resistance to movement. This kind of hinge is used to hold windows, flaps and panels in the right position. It also helps stop springback and the slamming. These Yale Defender egress friction stay hinges are easy to clean and allow full opening of windows in conformity with Building Regulations document B1. These Yale Defender egress clean friction stay hinges permit full opening of windows in accordance with Building Regulatio
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