1/2 x 4″ Round Cobalt Tool Bit • Ground HSS or Cobalt Available • High speed steel (HSS) provides good wear resistance and can be used in general purpose applications for both ferrous and nonferrous materials List Number TO07740 Substrate Cobalt Package Quantity 1 Length 4" Style Round Diameter 1/2 SKU: TO07740 Category: Tool Bits Related products 5/8 x 8″ Square HSS Tool Bit Item #: TO01748 3/4 x 8″ Square HSS Tool Bit Item #: TO01852 5/16 x 4″ Square HSS Tool Bit Item #: TO01340