Defender 'RESTRICTED' Friction Hinge - Top Hung SKU: Defender Restricted Friction Hinge - Top Hung Pinit Quantity discounts available QuantityPrice Quantity -+ Add to Basket Description Defender Restricted Friction Hinge for Top Hung Windows. Built-in child resistant mechanism limits initial opening. Restrictor automatically relocates and resets once is closed. Quick release lever allows the window to be fully opened for easy cleaning and total ventilation. Extended enclosed end cap enhances weather sealing performance of window. Compliant with BS EN 13126-6. Tested to BS EN 1670. Endurance tested to 30,000 cycles. You may also need the Phillips Pan Head 4.3mm x 25mm, A2 Stainless Steel Friction Hinge Screws. Use Code: FX-UKF4325-USS.DocumentationFire Escape Information: DownloadFriction Hinge Chart: DownloadData Card: Download