1/2 Dia. 1.0 Flute Length 1/2 Shank 3.0 OAL AlTiN coated 4 Flute. LakeShore endmills are made from the highest quality micro grain carbide 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 ballnose endmill made in the USA.