Precision Twist Drill Reduced Shank Drill, Heavy Duty, Series: R56CO, 1 in Drill Size - Decimal Inch, 6 in Overall Length, 4xD Cutting Depth, 2 Flutes, Spiral Flute, 3 in Flute Length, 1/2 in Shank, Reduced Shank, 118 deg Point, Split Point, Right Hand Cutting, HSS-E Cutting Edge, HSS-E, Steam/Bronze Oxide, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Alloy Steel/Hardened, Tempered Steel and Free Machining Stainless Steel