MORSE Screw Machine Drill, Heavy Duty, Series: 2435, Imperial, 25/64 in Drill - Fraction, 0.3906 in Drill - Decimal Inch, 3-1/4 in Overall Length, 1-7/8 in Cutting Depth, Standard Flute, 1-7/8 in Flute Length, 25/64 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, M42 Cobalt Cutting Edge, M42 Cobalt, Uncoated, Applicable Materials: Ferrous Casting, High Alloy Steel, Inconel, Stainless Steel, Titanium and Other Difficult-to-Drill Material