5mm RF100S/F 5FL 45? Helix Necked Weldon Flat Shank Firex Coated Carbide End Mill, 15mm LOC, 26mm Reach 15MM LOC,6MM SHANK,65MM OAL RF 100 S/F 5-Flute Right Hand 45? Helix, Right Hand Cut, Weldon Flat Shank, Extended Neck Relief, Extra Long (3XD) Length, High Performance Center Cutting Carbide End Mill with .05mm x 45? Corner Chamfer, Firex Coated for Universal Semi-Roughing & Finishing Materials up to 48 HRc. Series 3898 Guhring Part #9038980050000