MORSE Screw Machine Drill, Heavy Duty, Series: 2435, Imperial, X Drill - Letter, 0.397 in Drill - Decimal Inch, 3-5/16 in Overall Length, 1-15/16 in Cutting Depth, Standard Flute, 1-15/16 in Flute Length, 0.397 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, M42 Cobalt Cutting Edge, M42 Cobalt, Bright, Applicable Materials: Ferrous Casting, High Alloy Steel, Inconel, Stainless Steel, Titanium and Other Difficult-to-Drill Material