Taper Shank Drill Standard General Purpose Grade High Speed Steel Black Oxide Finish Conventional Point Drill Point 118 Deg Fractional Size 5/16 In Decimal Equivalent 0.3125 Flute Length 3 1/8 In Overall Length 6 3/8 In Morse Taper #1 Taper per Feet 0.5985 Taper per Inch 0.0498 Shank Dia 0.475 In Shank Length 2.56 In Taper Length 2.44 In Tang Length 0.37 In Tang Width 0.20 In Tang Radius 0.19 In