Helical Solutions 82829 | H40ALV-RN-ML-30250-R.060 0.2500" (1/4) Diameter x 0.2500" (1/4) Shank x 0.0600" Corner Radius x 4.0000" (4) OAL x 0.3750" (3/8) LOC 3 Flute Uncoated Coated Corner Radius End MillHelical Solutions 82829 H40ALV RN ML 30250 R. 060 0. 2500" (1 4) Cutter DIA x 0. 2500" (1 4) Shank DIA x 0. 0600" Radius x 0. 3750" (3 8) Length of Cut x 4. 0000" (4) Overall Length x 2. 5000" (2 1 2) Reach Carbide 40 Degree Helix Corner Radius End Mill for Aluminum, 3 Flutes, Uncoated (H40ALV RN ML 30250 R. 060). From the Helical Solutions End Mills for Aluminum 3 Flute Corner Radius 40 Degree Helix Variable Pitch Reduced Neck product family.