Silver steel
Silver steel is common tool steel that is supplied as a centerless ground round bar (with tolerances similar to that of drill rod). The name comes from the highly polished appearance of the rods; there is no silver in the alloy.
Amongst other applications, it has been widely used to make such things as punches, engravers, screwdrivers. Sheffield silver steel is used in France as a blade steel for straight razors. In Finland, German silver steel was and still is widely used for Puukko knives.