20mm RF100 Speed 4FL 48? Super-A Coated Carbide X-Long End Mill, Chipbreakers, Weldon Shank, 65mm LOC, 126mm OAL 65MM LOC,20MM SHANK,126MM OAL RF 100 Speed 4-Flute Right Hand 48? Helix, Right Hand Cut, Center Cutting Extra Long Length High Performance Carbide End Mill with Chip Breakers, Weldon Flat Shank, .30mm x 45? Corner Chamfer, Super-A Coated for Ramping, Helical Interpolation, Roughing and Finishing Stainless Steels, Steels and Nickel / Titanium Alloys Series 6761 Guhring Part #9067610200000