Helical Solutions 83545 | H40ALV-M-30500-R.020 0.5000" (1/2) Diameter x 0.5000" (1/2) Shank x 0.0200" Corner Radius x 4.0000" (4) OAL x 1.6250" (1-5/8) LOC 3 Flute Uncoated Coated Corner Radius End MillHelical Solutions 83545 H40ALV M 30500 R. 020 0. 5000" (1 2) Cutter DIA x 0. 5000" (1 2) Shank DIA x 0. 0200" Radius x 1. 6250" (1 5 8) Length of Cut x 4. 0000" (4) Overall Length Carbide 40 Degree Helix Corner Radius End Mill for Aluminum, 3 Flutes, Uncoated (H40ALV M 30500 R. 020). From the Helical Solutions End Mills for Aluminum 3 Flute Corner Radius 40 Degree Helix Variable Pitch product family.