M-42 Cobalt Roughing End Mill with Coarse Teeth Best for heavy cuts, deep slotting & pocketing applications, center-cutting for plunge cuts. Excellent in all steels, and nonferrous materials. Features include... 9/16" Mill Diameter 1-3/8 Length of Cut 1/2" Shank Diameter 3-3/8" Overall Length 4 Flutes