19.5mm Diver 4FL Variable Helix Necked Carbide End Mill, Plain Cylindrical Shank, Nano-Si Coated, 38MM LOC, 51.1MM Reach 38MM LOC,20MM SHANK,104MM OAL RF 100 Diver 4 Flute Right Hand 36?/38?/37?/38? Variable Helix, Right Hand Cut, Plain Cylindrical Shank, Extended Neck Relief Center Cutting Carbide End Mill with .20mm x 45? Corner Chamfer for High Performance Ramping, Slotting, Plunging, Helical Interpolation Roughing & Finishing Steel, Stainless Steel, Cast Iron, Nickel/Titanium Alloys & Aluminum Series 6737 Guhring Part #9067370195000