Precision Twist Drill Aircraft Extension Drill, Type B Extra Length Heavy Duty, Series: 502-12, N Drill - Letter, 0.302 in Drill - Decimal Inch, 12 in Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 3-1/16 in Flute Length, 0.302 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Oxide Treated, Applicable Materials: Plain Carbon Steel, Alloy Steel/Hardened and Tempered Steel, Free Machining Stainless Steel, Austenitic, Ferritic + Austenitic, Martensitic, Lamellar Graphite, Nodular Graphite/Malleable Cast Iron, Unalloyed Titanium, Alloyed Titanium, Nickel