Dormer Jobber Length Drill Bit, Type N General Purpose, Series: A100, Imperial, Z Drill - Letter, 0.413 in Drill - Decimal Inch, 133 mm Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 87 mm Flute Length, Straight Shank, 118 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Oxide Treated, Dark Gray, Applicable Materials: Plain Carbon Steel, Alloy Steel, Lamellar Graphite, Titanium, Alloyed and Cermet