... speed can be adjusted. 3-in-1 door closer hinge 1.Specifications Shaft DiameterĪ¦24mm Page Length 171mm Expanded Width ... from producing to finishing, high-precision testing equipments used, after series of strict testing, reliable and stable performance ensured, 2, ... effect as well 3 easy installations1) No difference from normal hinge installation, simplicity, flexibility, easy operation.2) no harm to ...