Chicago-Latrobe - Workman's Length Drill Bit, Series: 150L, Imperial, #54 - Wire, 0.055-Inch Drill - Decimal Inch, 1-7/8-Inch Overall Length, 5X Depth of Cut, 2 Flutes, Left Hand Spiral Flute, 7/8-Inch Diameter x 1-Inch Long Flute Length, Straight Shank, 118-Inch Degree Point, Radial Point, Left Hand Cutting Direction, HSS Cutting Edge, No Step Coolant, HSS, Bright, Applicable Materials: Alloy Steel, Carbon Steel, and Cast Iron