Corner Radius End Mill: 1/4" Dia, 3/8" LOC, 0.06" Radius, 3 Flutes, Solid Carbide 3" OAL, 1/4" Shank Dia, 40 ° Helix, Uncoated, Single End, Centercutting, Series End Mills for Aluminum - 3 Flute - Corner Radius - 400 Helix - Variable Pitch - Reduced Neck