[OD] Cutting Diameter (Size): 0.25mm[OD] Cutting Diameter (Decimal Inch): 0.0098[OD] Cutting Diameter (mm): 0.25[Od] Shank Diameter (Decimal Inch): 0.1181[Od] Shank Diameter (mm): 3.00[L1] Overall Length (Decimal Inch): 1.496[L1] Overall Length (mm): 38.00[L2] Length of Cut (Decimal Inch): 0.015[L2] Length of Cut (mm): 0.38Length Type: StubHelix Angle (Degree): 30Number of Flutes: 2Flute Style: Right Hand Spiral / Medium HelixType: Micro, Center Cutting Hand of Cut: Right-HandShank Type: Straight / CylindricalMaterial: Sub Micron Grain CarbideFinish / Coating: AlTiNSeries: 1620Primary Workpiece Material: Steel ~30HRC, Steel 30~40HRC, Hardened Steel ~55HRCSecondary Workpiece Material: Hardened Steel ~68HRC, Stainless Steel, Cast Iron, Nickel / Cobalt, Titanium AlloyApplication: Roughing / FinishingUnit of Measure: mm