You’ve probably got a basic tap die set. I was using better tools at sait and wanted to get some 1.5” dies in various sizes. Turns out the only economical way to get them in that larger size is to order a set. Otherwise it’s $20-25 or more per die! @johnnielsen John Nielsen suggested this set. Thanks John Well I ordered it from Acklands. Took a long time -2 months- to arrive. About $90. I’ve done some things with it. Pretty good I like it. The dies work from both ends. The wrenches are solid. Here is some photos including a comparison of wrench size from the cheap set and this new set. The part number is in the photos if you want to know more.