Dormer Dormer Extra Length Drill, Type N General Purpose, 10 mm Drill Size - Metric, 0.3937 in Drill Size - Decimal Inch, 400 mm Overall Length, 10XD Cutting Depth, 2 Flutes, Spiral Flute, 300 mm Flute Length, 10 mm Shank, Straight Shank, 118 deg Point, Right Hand Cutting, HSS Cutting Edge, HSS, Steam Oxide, Applicable Materials: Magnetic Soft Steel, Alloy Steel, Lamellar Graphite, Aluminum, Magnesium, Unalloyed and Copper, No Through Coolant (Yes/No)