4mm RF100 Speed 4FL 48? Super-A Coated Carbide X-Long End Mill, Chipbreakers, Plain Shank, 16mm LOC, 65mm OAL 16MM LOC,6MM SHANK,65MM 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, Plain Cylindrical Shank, .06mm x 45? Corner Chamfer, Super-A Coated for Ramping, Helical Interpolation, Roughing and Finishing Stainless Steels, Steels and Nickel / Titanium Alloys Series 6766 Guhring Part #9067660040000