Precision Twist Drill Screw Machine Drill, Heavy Duty, Series: R41C, Imperial, #30 Drill - Wire, 0.1285 in Drill - Decimal Inch, 1-15/16 in Overall Length, 2.5XD Cutting Depth, 2 Flutes, Spiral Flute, 15/16 in Flute Length, 0.128 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Steam Tempered, Dark Gray, Applicable Materials: Alloy Steel, Brass, Bronze, Copper, Ferritic + Austenitic, Hardened and Tempered Steel, Martensitic, Magnetic Soft Steel, Nickel, Nodular Graphite/Malleable Cast Iron, Plain Carbon Steel, Structural Steel/Case Carburizing Steel and Titanium