Multifunctional hinge,3-in-1 door closer hinge.Easy opening and closing,shock absorbing.Closing speed can be adjusted. 3-in-1 door closer hinge 1.Specifications ... , flexibility, easy operation.2) no harm to the door, frame, wall and other home structure4 high safety factor usage ... to the shock absorbing, make the door and door frame not destroyed ,meanwhile prolong the working life 5 door closing ...