The Micro 100 16R754 is a 1/2" diameter, 4 flute, carbide thread mill with a 1/2"-13 UNC thread. It has a TiAlN coating and can cut a variety of materials including steel, stainless steel, cast iron, aluminum, and more. With a reach of 1-1/2", this thread mill is designed for deep hole threading applications. The carbide construction provides wear resistance and strength for long tool life. The 4 flute design allows for efficient chip removal. This thread mill is made in the USA by Micro 100, a manufacturer known for high performance end mills, drills, and other cutting tools.