Perhaps it's just that the pictures are terrible. I don't see any pads that could be used and there's no info specifying the pin spacing on those external connectors which, possibly, are intended for some sort of external interface, which they define but for which there are no specifications.

How does one affix a tqfp or pqfp to these adapters? I don't see any pads except on the outer edge of the board, and those are for the external inteface connector, right?

Before I can get behind using a device such as this, I need precise dimensional specifications including finished hole sizes, hole center spacing, dimensional tolerances, pad dimensions and precise locations, and that sort of thing. Without those spec's, I have to make 'em myself, which doesn't cost any more, even if I have 'em made here in the U.S. If I do that, I get exactly what I need, and don't have to modify them before they're useable.

RE