Aluminium hinge with flexible spring steel spring. To control the closing power of the doors, it has a stainless steel arm with adjustable force. In addition, it includes lag screws for proper assembly. This type of hinge is special for regulating the power and closing force of doors with a light weight, maximum of 40 kg. Thanks to this tool, avoid uncomfortable slamming or loud and annoying knocks when closing the door. The pernium and arm are 190 and 180 mm long respectively. The bolt is made of aluminium and the arm is made of stainless steel. Also, the flexible spring steel allows the spring to possess high torsional strength.