All Atlas solid carbide end mills are manufactured in the USA with only the highest grade carbide available. This metric end mill has a square end cut with a 4MM diameter and an overall length of 50MM (regular length). It has a single end and is center cutting. This cutter has 4 flutes, which provides a smoother finish than tools with lower flute counts and has a 30° helix that can be used for a wide range of applications. This end mill is uncoated.