Sandvik Coromant R216.33 Carbide Square Nose End Mill, Metric, Plain Finish, Roughing Cut, 40 Deg Helix, 3 Flutes, 100mm Overall Length, 12mm Cutting Diameter, 12mm Shank Diameter Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems Titanium aluminum nitride coatings become self-lubricating when used at very high speeds, making them ideal for cutting without coolant ("dry machining") Round shanks allow use with a wide variety of toolholding systems Shank Style: Cylindrical Neck Length: 0.047 inches Neck Diameter: 0.018 inches Geometry: U Wavy 9 to 12 for aluminum Gauge Length: 2.165