Chicago-Latrobe - Workman's Length Drill, Series: 150K, Imperial, 15/64 in. Drill - Fraction, 0.2344 in. Drill - Decimal, 3-7/8 in. Overall Length, 5X Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 2-5/8 in. Dia. Flute Length x 1-1/64 in. on L Shank, Straight Shank, 118 Degree Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, No Step Coolant, HSS, Black Oxide, Applicable Materials: Medium Steel, Mild Steel, Magnesium and Magnesium Alloy