Series Name 4 Diameter Inch 238 Diameter Decimal Inch 2375 Series CodeSeat Size 4 Material High Speed Steel Coating TiN Thickness Inch 516 Included Angle 132 For general purpose applications in a variety of materials and for drilling in applications where added toughness is required such as unstable set ups on manual machines or cross hole drilling Series 14 132Deg point Series 57 144Deg point