I just went out to the shop to look at mine again, they are around 30 years old and they came with the lathe that was sold several years ago. The parting tool is the same part number at the one in the photo and they are carbon steel tools. I have other tools that are HSS and some carbide but for probably 25 years I used the Crapsman tools and made thousands of pens and other stuff with them. I touched the back of one of the tools to the slow speed grinder to confirm the carbon steel and, yup, they are CS. They throw sparks that look like a flame thrower compared to the HSS but, as my dad used to say, "it's a poor craftsman that blames his tools". I would buy them if just for that sweet parting tool; mine's getting pretty short from all the sharpening.
WB