Specification: Cutting Edge Diameter: 3.8mm / 0.15" Cutting Edge Length: 40mm / 1.57" Shank Diameter: 3.8mm / 0.15" Overall Length: 80mm / 3.15" Material: K35 Tungsten Carbide (HRC92-94) Finish: Titanium Coated (Nanometer Coating) Cutting Hardness (Max