... -1 door closer hinge.Easy opening and closing,shock absorbing. auto close hinge1.Specifications Shaft DiameterΦ24mm Page Length 171mm Expanded ... , simplicity, flexibility, easy operation.2) no harm to the door, frame, wall and other home structure4 high safety factor usage 1 ... ) due to the shock absorbing, make the door and door frame not destroyed ,meanwhile prolong the working life 5 door closing ...