The Ridgid 37845 1-1/2" 11-1/2 NPT 12R Alloy Pipe Dies are high-quality die tools designed for right-hand threading. Made by the reputable brand RIDGID in the United States, these dies come in sizes 00R, 11R, 111R, 30A, and 31A to accommodate various pipe diameters. Included in the set are pipe dies, providing users with the essential attachments for their pipe threading needs. The NPT thread standard ensures consistent and precise threading for pipes, making these dies a reliable and durable option for professionals in the field.