Tool question: 1/2" socket adaptor for cordless driver?

Does anybody know if there is such a beast? I'm imagining a hex shaped fitting that fits into the chuck of a cordless drill and has a 1/2" male drive (the same as a normal rachet socket bar or breaker bar etc), that would take a series of sockets.

I have just bought a Makita 1/2" drive rattle gun (18v cordless), but if I could also get a something along the same lines for the matching cordless drill, it would be great too. I know the drill doesn't have the same torque capabilities of the rattle gun, but it'd be good anyway.

BTW, the 18v rattle gun is GREAT. I removed the 6 M8 bolts that hold my bash plate on in the blink of an eye today.....!!!!

Roachie