. 3-1/2 x 3-1/2 x 5/8 Radius Hinge; Heavy Duty; Bright Chrome Finish.3-1/2 x 3-1/2 x 5/8 Radius Hinge; Heavy Duty; Bright Chrome 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.