The NOS ENCO 315-2810 H.S. Pipe Thread Chaser Die Set is a high-quality tool designed for right-hand threading in 1" NPT pipes. Made of durable high-speed steel, this die set includes four units and comes with a pipe die attachment. Manufactured in the United States by Enco, this set is perfect for professionals in the plumbing and pipe fitting industry looking to ensure precise and reliable threading with the 11-1/2 inch model.