20mm RF100TI 4FL Variable Helix Super-A Carbide End Mill, Necked, Weldon Shank, 2.0mm Radius, 38mm LOC, 52mm Reach 38MM LOC,20MM SHANK,104MM OAL RF 100 Ti 4-Flute, Right Hand 35?/38? Variable Helix, Right Hand Cut, Weldon Flat Shank, Extended Neck Relief, Center Cutting Standard Length High Performance Carbide End Mill with 2.00mm Corner Radius, Super A Coated for Slotting, Ramping, Helical Interpolation, Roughing and Finishing Special and Titanium / Nickel Alloys Series 3499 Guhring Part #9034990200200