Harvey Tool 726116 | 0.2500" (1/4) Cutter Diameter x 0.3750" (3/8) LOC x 2.5000" (2-1/2) OAL x 0.0050" Corner Radius 3 Flute Uncoated Corner Radius End MillDesigned for aluminum and aluminum alloys with excellent performance in copper, brass, and bronze alloys, this variable helix end mill with a corner radius profile increases material removal rates (MRR). Features Variable helix design (approximately 42 Degree) reduces chatter and harmonics, and increases material removal rates h6 shank tolerance for high precision tool holders 3 Flutes Center cutting Solid carbide CNC ground in the USA Product