8mm RF100F 4FL Variable Helix Necked Weldon Flat Shank Firex Coated Carbide End Mill, 19mm LOC, 26mm Reach 19MM LOC,8MM SHANK,63MM OAL RF 100 F 4-Flute Right Hand 40?/42? Variable Helix, Right Hand Cut, Weldon Flat Shank, Extended Neck Relief, Standard Length, High Performance Center Cutting Carbide End Mill with .15mm x 45? Corner Chamfer, Firex Coated for Roughing, Slotting, Ramping, Helical Interpolation and Finishing Materials up to 30 HRc. Mild and Free-Cutting Steels, Unalloyed Heat-Treatable & Case Hardened Steels, Nitriding Steels, Stainless Steels, Grey Cast Iron, Copper, Brass, Bronze , Magnesium Alloys and Titanium Alloys. Series 3630 Guhring Part #9036300080000