Titanium Nitride Coated Roughing End Mill Best for heavy cuts, deep slotting & pocketing applications. TiN coating provides an ability to increase machine speeds by 10 to 20% vs uncoated tools. Excellent in all steels, and nonferrous materials. Great for General Purpose Use Features include... 1.25" Mill Diameter 4" Length of Cut 1.25" Shank Diameter 6.5" Overall Length 6 Flutes