These end mills have an extended neck with a reduced diameter that prevents them from rubbing against your workpiece when deep milling. Serrations along the cutting edge act as chip breakers, removing large amounts of material at high speeds without sacrificing tool life. End mills have a fine flute pitch, so they last longer than coarse-pitch end mills and produce smaller chips for better performance on hard metals like iron, titanium, and tool steel.

A 45° corner chamfer improves cutting edge strength, so these end mills last longer than standard square end mills when milling hard material; however they do not create as sharp of a corner. They have a square end for milling square-bottomed slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface.

Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking.

Alternating layers of titanium nitride (TiN) and titanium aluminum nitride (TiAlN) coatings give these end mills the hardness, wear resistance, and temperature resistance needed for cutting tool steel, hardened steel, and iron.