A lot of these things seem to twist or break if you lean on 'em hard! Trouble is, manufacturers insist on using stuff like relatively big countersunk screws with a stupidly small Torx recess!
Best bit's I've found, by far, are PB Swiss, but I think they only offer smaller hex bit's like 1/4 and 5/16.
For the larger style to use directly with say a 1/2 inch ratchet or breaker bar, I've got Snap On, Ko Ken and Stahlwille, and havn't twisted or broken any of 'em yet! None of 'em are intended for impact use though, so I don't use 'em for that!
I've used a load of others, and twisted or broken most of the makes sooner or later. Anything Taiwanese, whatever name it's sold under, seems to twist! I only really buy the above now, though I suspect the Hazet and the Nepros are good and tough too!
KoKen make impact Torx sockets, and I think Stahlwille do as well! If you're going to be using them on an impact driver or suchlike then I think you'll probably break any tool designed for hand use!