Chicago-Latrobe - Screw Machine Drill, Heavy Duty, Series: 159, Imperial, #13 - Wire, 0.185 in Drill - Inch Decimal, 2-3/16 in Overall Length, 3XD Depth of Cut, 2 Flute, Right Hand Spiral Flute, 1-1/8 in Flute Length, 0.185 in Diameter x 1.0625 in L Shank, Straight Shank, 135 Degree Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Black Vapor Oxide, Applicable Materials: Alloy Steel, Carbon Steel, Cast Iron and Tool Steel