[OD] Cutting Diameter (Size): 5.50mm[OD] Cutting Diameter (Decimal Inch): 0.2165[OD] Cutting Diameter (mm): 5.50[Od] Shank Diameter (Decimal Inch): 0.2362[Od] Shank Diameter (mm): 6.00[L1] Overall Length (Decimal Inch): 1.969[L1] Overall Length (mm): 50.00[L2] Length of Cut (Decimal Inch): 0.325[L2] Length of Cut (mm): 8.25Length 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: UncoatedSeries: 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