12mm RF100A 3FL Variable Helix, Necked Plain Shank, (3xD) X-Long Bright Carbide End Mill, 36mm LOC, 46mm Reach 36MM LOC,12MM SHANK,93MM OAL RF 100 A 3-Flute, Right Hand 39?/40?/41? Variable Helix, Right Hand Cut, Plain Cylindrical Shank, (3XD) Extra Long Length, Extended Neck Relief, Center Cutting Carbide End Mill, .12mm x 45? Corner Chamfer, Bright Uncoated for Roughing and Finishing Aluminum & Aluminum Alloys, Brass, Bronze, Copper, Magnesium and Plastic Series 6730 Guhring Part #9067300120000