"Name: Invisible Cross Hinges Material: Zinc Alloy + Stainless Steel Size: As shown in time Color: Silver < p>Bearing Strength: 7kg, 10kg, 20kg Feature: Installation in wooden doors, aluminum frame doors, the hidden type can be installed on bifold doors The main body is made of die-cast zinc alloy, the connecting piece is made of high quality 304 stainless steel Hinge mounted in the door leaf, 180 degree opening angle, after closing the hinges are not exposed After closing the Hinges, the door gap less than 1mm can be used for folding doors. How to install the hinge: According to the physical and reference diagram, determine the number of hinges and draw lines in the appropriate place. According to the drawn line, when the door leaf is opened, the hinge seat can be inserted into the hole of the door plate and fixed with screws. In the opening hole of the corresponding position of the door. Lift the door leaf, the hinge side of the door, the seat can be inserted into the hole and fixed