The Frelan Hardware Single Action Fire Door Spring Hinges Polished Chrome will open only one way and the tensioning of the spring mechanism will close the door. Spring hinges have gained popularity in dwellings which require self-closing fire doors such as flats and multiple storey town houses. The J9800 spring hinge set is designed to be used on residential fire doors or any internal domestic door which requires closing.  Supplied as a set they can be tensioned as required to give the closing action required. Please note the closing action is by simple spring tension and t...