X91 elbow hinge Nickel plated. Equipped with a spring both in closing and opening, it has a damper piston for a smooth movement of the door. The adjustment of the X91 elbow hinge is three-dimensional and the depth adjustment is made by eccentric. Due to its design, it is recommended to be installed on doors with a thickness between 14 mm and 24 mm. The opening margin it provides is 105 ° and the cup drilling range D = 3 ~ 7mm. The cup has a circumference dimension of 35 mm, the mounting system of the hinge to the supplement of this series is automatic.