What's the alternative to the CMS inserts?

What's the alternative to the CMS inserts?

CMS Inserts are the miniature inserts.

The part number of CMS inserts are built with first "CM", then the number of the metric internal diameter and then "S"

For example the M2 insert has the part number CM020S

The tools is then built the same but at the end there's "KT"

Here's the cross reference table: