3.0MM Dia. 12.0MM Flute Length 3.0MM Shank 39.0MM OAL TIALN coated center cutting. LakeShore endmills are made from the highest quality micro grain carbide and coatings to deliver the performance of the big name endmills at a little guy price. 30 degree helix helps maximize production in a wide range of materials. An excellent general purpose endmill made in the USA.