... , simple heat treatment, good machinability and toughness properties, bright ground and polished according to standard DIN 670 ... tools, piercing punches, ejector pins, twist drills, punches and taps, surgical instruments, reamers, countersinks, dowels, engraving tools, ... metal cutting saws, axles and shafts, toothed drills, scraping tools, gear cutters, mortice, ...