Need help understanding torx types

[Trav]

I have not seen a set of E-Torx impacts in a set, the Hazet line is the 900S, I bought min as singles. You can get them here for about $75 + shipping for all of the ones they make, add your own socket rail.

https://www.misterworker.com/en-us/hazet/impact-socket-torx-square-1-2-with-borehole/48631.html