16mm RF100U 4FL Variable Helix Firex X-Long (4XD) Carbide End Mill, Necked, Plain Shank, 65mm LOC, 150mm OAL, 78mm Reach 65MM LOC,16MM SHANK,150MM OAL RF 100 U 4-Flute Right Hand 35?/38? Variable Helix, Right Hand Cut, Plain Cylindrical Shank, .35mm x 45? Corner Chamfer, Firex Coated, Extended Neck Relief, Center Cutting High Performance Extra Long (4XD) Length Carbide End Mill For Roughing and Finishing Alloyed Steels, Cast Iron, Free Cutting Steels, Tool Steels, Hardened Steels, Titanium and Titanium Alloys & Other Special Alloys Up to 54 HRc Series 3627 Guhring Part #9036270160000