The Micro 100 16R654 is a 1/2" diameter, 4 flute, carbide thread mill with a TiAlN coating. It has a right hand cut and can produce unified threads from 4-56 to 1/2-13. The overall length is 3" and it has a 1/2" shank. This thread mill is made of micrograin carbide with a titanium aluminum nitride coating for wear resistance and heat dissipation. It can machine a wide range of materials including steel, stainless steel, cast iron, aluminum, brass, bronze and plastics. The 4 flute design provides efficient chip removal. This thread mill is manufactured in the USA by Micro 100, a leading brand for high performance cutting tools.