Harvey Tool 890916-C3 | 270 Degree Sperical Ball 1/4" Diameter x 1/4" Shank x 0.2130" LOC x 2-1/2" OAL FL AlTiN Coated Carbide Undercutting End MillProduct Specifications Mill Diameter (Decimal Inch) 0. 2500" Mill Diameter (Inch) 1 4" Neck Diameter (Decimal Inch) 0. 1360" Length Of Cut (Decimal Inch) 0. 2130" Neck Length (Decimal Inch) 0. 5000" Neck Length (Inch) 1 2" Overall Reach (Decimal Inch) 0. 7130" Overall Length (Decimal Inch) 2. 5000" Overall Length (Inch) 2 1 2" Radius (Decimal Inch) 0. 1250" Radius (Inch) 1 8" Wrap Angle 270 Degree Right Hand Teeth 16 Left Hand Teeth 13 Shank Diameter