12mm RF100S/F 5FL 45? Helix Necked Plain Cylindrical Shank Firex Coated Carbide End Mill, 36mm LOC, 46mm Reach 36MM LOC,12MM SHANK,93MM OAL RF 100 S/F 5-Flute Right Hand 45? Helix, Right Hand Cut, Plain Cylindrical Shank, Extended Neck Relief, Extra Long (3XD) Length, High Performance Center Cutting Carbide End Mill with .15mm x 45? Corner Chamfer, Firex Coated for Universal Semi-Roughing & Finishing Materials up to 48 HRc. Series 3897 Guhring Part #9038970120000