Deltana (PAIR) 4 x 4″ Ball Bearing 5/8″ Radius Corners Mortise Hinge S44R5HDB15A
4″ x 4″ Ball Bearing 5/8″ Radius Corners Mortise Hinge. Mount: Mortise. Ball Bearing Hinge : Ball bearing hinges are designed to handle the extra stress brought on by high traffic doorways. The greased bearings reduce the rotational friction extending the life of a hinge in heavy use situations.