... ,3-in-1 door closer hinge.Easy opening and closing,shock absorbing.Closing speed can be adjusted. 3-in-1 door closer hinge 1 ... performance ensured, 2, nice looking shape, no need of connection.1), no connecting parts,. petite structure, elegant shape2),Application ... , better usage, better visual effect as well 3 easy installations1) No difference from normal hinge installation, simplicity, flexibility, ...