Long Neck Micro Ball Nose End Mill Corner Radius (R), mmBlade Length (ℓ), mmEffective Length (E), mmTotal Length (L), mmShank Diameter (D), mm 0.20R0.845040.20R0.865040.25R1.045040.25R1.065040.25R1.085040.30R1.245040.30R1.265040.30R1.285040.40R1.645040.40R1.665040.40R1.685040.50R2.065040.50R2.085040.50R2.010504