MORSE® Aircraft Drill, 1-Stage Type B Heavy Duty Jobber Length, E Drill Size - Letter, 0.25 in Drill Size - Decimal Inch, 4 in Overall Length, 2-3/4 in Cutting Depth, Standard Flute, 2-3/4 in Flute Length, Straight Shank, 135 deg Point, Split Point, Right Hand Cutting, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Stainless Steel, Titanium, Steel Alloy and Other Low to Medium Tensile Strength Materials