Left Hand 4 x 4-1/4 x 5/8 Radius x SQ Hinge; Security Stud; Zinc Dichromate Finish Deltana inventories the largest selection of architectural and door hardware in over nine fine finishes made from solid brass, zinc, aluminum, steel and stainless steel.. Left Hand 4 x 4-1/4 x 5/8 Radius x SQ Hinge; Security Stud; Zinc Dichromate Finish.