2.50 mm Cutter Diameter x .20 mm Radius x 12.00 mm Length of Cut Carbide Corner Radius End Mill For Exotic High Temp Alloys, 3 Flutes, AlTiN Nano Coated. The variable helix design of the Variable Helix End Mills for High Temp Alloys - Corner Radius reduces chatter and harmonics and increases material removal rates (MRR) in titanium alloys, inconel, nickel alloys, and other high-temperature materials