Cle-Line® Jobber Length Drill Bit, Series: 1899, Imperial, 1/2 in Drill - Fraction, 0.5 in Drill - Decimal Inch, 6 in Overall Length, 5XD Cutting Depth, 2 Flutes, Right Spiral Flute, 4-1/2 in Flute Length, 1/2 in Dia x 1-1/2 in L Shank, Straight Shank, 118 deg Point, Radial Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Black Oxide, Applicable Materials: Alloy Steel, Carbon Steel, Low Carbon Steel, Gray Cast Iron, Nodular Cast Iron and Aluminum