Helical Solutions 88571 | HSV-RN-4 0.5000" Diameter x 0.5000" Shank x 4.0000" OAL x 0.0200" Radius 4 Flute Aplus Coated Corner Radius End MillProduct Specifications # Manufacturer Number 88571 Cutter Diameter (Inch) 1 2" Cutter Diameter (Decimal Inch) 0. 5000" Neck Diameter (Inch) 15 32" Neck Diameter (Decimal Inch) 0. 4750" Shank Diameter (Inch) 1 2" Shank Diameter (Decimal Inch) 0. 5000" Overall Length (Inch) 4" Overall Length (Decimal Inch) 4. 0000" Length of Cut (Inch) 5 8" Length of Cut (Decimal Inch) 0. 6250" Corner Radius (Decimal Inch) 0. 0200" Number of Flutes 4 Center Cutting (Yes