Cutting Diameter (Size): 1/4"Cutting Diameter (Decimal Inch): 0.2500Cutting Diameter (mm): 6.35Shank Diameter (Decimal Inch): 0.1875Shank Diameter (mm): 4.76Overall Length (Decimal Inch): 3.000Overall Length (mm): 76.20Length of Cut (Decimal Inch): 0.375Length of Cut (mm): 9.53Length Type: StubHelix Angle (Degree): 30Number of Flutes: 2Flute Style: Right Hand Spiral / Medium HelixType: Micro, Center CuttingHand of Cut: Right-HandShank Type: Straight / CylindricalMaterial: Sub Micron Grain CarbideFinish / Coating: AlTiNSeries: 1685Primary 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: inch