Seco Micro Drill, Series: 640MA, 0.41 mm Drill Size - Metric, 0.0161 in Drill Size - Decimal Inch, 38 mm Overall Length, 2xD Cutting Depth, 2 Flutes, Spiral Flute, 1.6 mm Flute Length, 3 mm Shank, Cylindrical Shank, 130 deg Point, Self-Centering Point, Right Hand Cutting, Solid Carbide Cutting Edge, Solid Carbide, Uncoated, Applicable Materials: Cast Iron, Non-Ferrous Materials and Plastic