This set of RIDGID 50665 pipe dies is perfect for those looking for a reliable tool to thread pipes. The dies are made of high-quality alloy steel and are specifically designed for use with 3/8" NPT pipes. With a right-hand threading direction and conforming to NPT thread standards, these dies are a must-have for any plumber or pipefitter. The set includes the necessary attachments for threading pipes, making it easier for you to get the job done.