Chicago-Latrobe Screw Machine Drill, Heavy Duty, Series: 159, Imperial, #53 - Wire, 0.0595 in Drill - Decimal Inch, 1-5/8 in Overall Length, 3XD Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 5/8 in Dia x 1 in L Flute Length, 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