Chicago-Latrobe Screw Machine Drill, General Purpose, Series: 157L, Imperial, #42 - Wire, 0.0935 in Drill - Decimal Inch, 1-3/4 in Overall Length, 3XD Depth of Cut, 2 Flutes, Left Hand Spiral Flute, 3/4 in Dia x 1 in L Flute Length, Straight Shank, 11.8 Degree Point, Radial Point, Left Hand Cutting Direction, HSS Cutting Edge, Bright, Applicable Materials: Carbon Steel, Mild Steel, Non-Ferrous Materials, Aluminum, Magnesium, Copper, Wood, Slate, and Some Thermoplastics