8mm Aero-Tech 3 Flute 45? Helix Carbide Plain Shank End Mill Firex Coated, 9mm LOC, 22mm Reach 9MM LOC,8MM SHANK,58MM OAL AERO-TECH / GH 100 U 3 Flute Stub Length, Right Hand 45? Helix, Right Hand Cut, Weldon Flat Shank, Center Cutting Carbide End Mill, .10mm x 45? Corner Chamfer, Firex Coated. Optimized flute geometry for ultimate efficiency in slot milling and roughing operations in aluminum, alloyed steels, free cutting steels, tool steels, stainless steels, cast iron, brass, bronze, plastics, special alloys & hardened steels to 54 HRc Series 3729 Guhring Part #9037290080000