The Staten Tools NPT Universal 47770 1/2"-3/4" Hardened Steel Pipe Dies are specifically designed to fit RIDGID 8 pipe threaders. These high-quality dies are made of hardened steel, ensuring durability and long-lasting performance. With the ability to handle pipe sizes ranging from 1/2" to 3/4", these dies are perfect for professionals in the plumbing and HVAC industries who require precise and reliable pipe threading. The universal fit makes them versatile for use with various pipe threaders, providing convenience and efficiency in any work setting.