Series Name 5 Diameter Inch 21316 Diameter Decimal Inch 28125 Series CodeSeat Size 5 Material High Speed Steel Coating TiN Thickness Inch 716 Included Angle 144 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