5/8 Dia. 3/4 Flute Length 5/8 Shank 3.0 OAL AlTiN 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 help maximize production in a wide range of materials. An excellent general purpose endmill made in the USA.