This set was handed down by my grandfather.  I just have no use for it.  The die sizes are 1-11 1/2 NPT, 1/4-18 NPT, 1/2-14 NPT, 3/4-14 NPT.

The Vintage Craftsman Pipe Die Set includes manual pipe threaders for 1/4”, 1/2”, 3/4" and 1” sizes. Made in the United States, this set features high-quality pipe dies from the trusted brand Craftsman. Perfect for those in the business & industrial sector or handy professionals looking for reliable pipe tools, this set is a valuable addition to any toolbox or workshop.