The Grainger 1/4" Carbide Threading Tool is a high-speed steel threading insert designed for cutting threads in steel, stainless steel, cast iron, aluminum, and other metals. It features a TiN coating for wear resistance and lubricity. The insert has a 16 mm shank diameter and fits standard tool holders. It can cut 60 degree threads from 4-56 to 1/4-20 TPI in a variety of materials. The carbide composition provides strength and heat resistance for optimal thread cutting performance. This durable threading tool is made in the USA and ideal for production threading applications.