I went to that site and they mention TPI for imperial knurls. Does it really matter ? is there some significance of TPI and lead screw TPI ? I purchased some knurls off of Ebay and kind of thought it was just a hit or miss proposition. The learning curve never ends...Here's a very good knurl tool supplier. Top flight stuff.
https://www.accu-trak.com/index.html
Regards
Ray C.