1/16 Dia. 1/4 Flute Length 1/8 Shank 1.5 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 helps maximize production in a wide range of materials. An excellent general purpose endmill made in the USA.