Some of the through sockets at least "claim" to have an internal conventional square drive. Mine however did not have them.
He wants the same adapter as I do: going from square drive to the Vortex socket drive.
The kits usually include an adapter from their Vortex ratchets to 1/4" and 3/8" drive, but not from a standard ratchet to the Vortex sockets.
You might not think about it when initially buying into the Vortex series, but there is no torque wrench, swivel or bar extension.
The lack of torque wrench alone moves them from serious tools, to the handyman category. They might as well put a pink flower pattern on them.
I bought three sets recently (yes, the Sears Labor Day sale), before I realized this limitation. I need to buy a Vortex extension piece so that I can have a standard socket welded onto it as an adapter. Or perhaps pinned inside, so that the heat treatment is not lost or too much of the chrome compromised.
I don't think that I'm atypical for needing a torque wrench option. I consider myself right in the middle. You'll never hear me claim to have a "calibrated arm", but I don't insist that monthly calibration is required before I'll use a torque wrench. There are just some things (wheels, suspension parts, drain plugs into expensive castings) that I don't like risking a failure.