Mill Diameter Inch 564 Number of Flutes 4 Material Cobalt Length of Cut Inch 18 Shank Diameter Inch 316 FinishCoating Bright Single or Double End Double Center Cutting Yes Overall Length Inch 2 Flute Direction Right Cutting Direction Right Variable Helix No Helix Angle 30 Suitable for finishing of precision components such as watch, camera, and electronic apparatus molds