5/16 x 4″ Square HSS 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 TO01340 Substrate HSS Package Quantity 1 Length 4" Style Square Diameter 5/16 SKU: TO01340 Category: Tool Bits Related products 3/16 x 2-1/2 Square HSS Tool Bit Item #: TO01125 1/4 x 6″ Square HSS Tool Bit Item #: TO01229 1/2 x 4″ Square HSS Tool Bit Item #: TO01640