Dormer Jobber Length Drill Bit, Type N General Purpose, Series: A012, Imperial, I Drill - Letter, 0.272 in Drill - Decimal Inch, 4-1/8 in Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 2-7/8 in Flute Length, 0.272 in Shank, Straight Shank, 118 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, TiN, Gold, Applicable Materials: Aluminum, Alloy Steel, Copper, Magnetic Soft Steel, Magnesium and Lamellar Graphite