Starrett 83A-4 Solid Nut Dividers, Steel, Flat Leg, 0-8" Range
Starrett "Yankee" Dividers are made from a high-grade steel and well-finished.  The legs are made of flat stock and are very durable.  The fulcrum stud is hardened and has a smooth bearing surface.  The bow string, although flexible, is exceedingly strong