8mm RF100U 4FL Variable Helix Firex Carbide End Mill, Necked, Weldon Shank, 1.0mm Radius, 19mm LOC, 26mm Reach 19MM LOC,8MM SHANK,63MM OAL RF 100 U 4-Flute Right Hand 35?/38? Variable Helix, Right Hand Cut, Weldon Flat Shank, 1.00mm Corner Radius, Firex Coated, Extended Neck Relief, Center Cutting High Performance Standard 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 3873 Guhring Part #9038730080100