Helical Solutions 83558 | H40ALV-RN-X-30187 0.1875" (3/16) Diameter x 0.1875" (3/16) Shank x 3.0000" (3) OAL x 0.2187" (7/32) LOC 3 Flute ZPLUS Coated Square End MillHelical Solutions 83558 H40ALV RN X 30187 0. 1875" (3 16) Cutter DIA x 0. 1875" (3 16) Shank DIA x 0. 2187" (7 32) Length of Cut x 3. 0000" (3) Overall Length x 1. 5000" (1 1 2) Reach Carbide 40 Degree Helix Square End Mill for Aluminum, 3 Flutes, ZPLUS Coated (H40ALV RN X 30187). From the Helical Solutions End Mills for Aluminum 3 Flute Square 40 Degree Helix Variable Pitch Reduced Neck product family.