Chicago-Latrobe - Screw Machine Drill, Heavy Duty, Series: 159-TN/2159, Imperial, #12 Drill - Wire, 0.189 in - Decimal Inch, 2-1/4 in Overall Length, 1-3/16 in Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 1-3/16 in Flute Length 0.189 in Diameter x 1 .0625 in L, Straight Shank, 135 Degree Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, TiN Coated. Applicable Materials: Alloy steel, carbon steel, cast iron and tool steel