Precision Twist Drill Reduced Shank Drill, General Purpose, Series: R57, 49/64 in Drill - Fraction, 0.7656 in Drill - Decimal Inch, 6 in Overall Length, 4xD Cutting Depth, Spiral Flute, 3 in Flute Length, 1/2 in Shank, 3-Flat Reduced Shank, 118 deg Point, Conventional Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Oxide Treated, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Alloy Steel/Hardened, Tempered Steel and Free Machining Stainless Steel