Latrobe Chicago Screw Machine Drill, General Purpose, Series: 157L, Imperial, 13/64 in. Drill, Fraction, 0.2031 in. Drill, Decimal Inch, 2-1/4 in. Overall Length, 3XD Depth of Cut, 2 Flutes, Left Hand Spiral Flute, 1-3/16 in. Flute Length, Dia. x 1-1/16 in. L Shank, Straight Shank, 118 Degree Point, Radial Tip, Left Hand Cutting Direction, HSS Cutting Edge, HSS, Bright, Applicable Materials: Carbon Steel, Mild Steel, Non-Ferrous Materials, Aluminum, Magnesium, Copper, Wood, Slate and some Thermoplastic