Chicago-Latrobe Workman's Length Drill Bit, General Purpose, Series: 150, Metric/Imperial, 0.0394 in. Bore, Decimal Drill, 1.339 in. Overall Length, 5X Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 0.472 in. Flute Length, Diameter x Shank L, Straight Shank, 0.433 in. 8 Degree Point, Radial Tip, Right Hand Cutting Direction, HSS Cutting Edge, No Step Coolant, HSS, Black Oxide, Applicable Materials: Carbon Steel and Cast Iron