Jim, I've seen them break, usually a deep well splits up the side.
Just be careful, it can be a dangerous job.

If you submitted your medical and dental bills to Stanley, they might
pay.  There's an out-of-print book by Ralph Charell documenting how he
always got responsible parties to pay.  He never made outrageous
demands, except when he threatened to put the local phone company out
of business.

I thought that thin socket walls were a sign of high quality because it
meant that the tool maker used better steel, and Snap-On is known for
having some of the thinnest sockets.  My Craftsman sockets are much
thinner than the badly plated, rusting generics I keep in the trunk.

I do have Craftsman deep sockets, but for home use.  Can't beat those
$20/set sale prices.  But, I'd consider something else for pro use,
probably S-K.  Problem is, many of the better tool companies have been
undercut by cheaper brands and have gone belly up.  Williams made the
finest adjustable wrenches ever.  Bonney made superb box/end/combo
wrenches and I'm sure they were the supplier for Snap-on before they
bit the bullet.  They invented and patented the flank box design you
see everywhere, now that the patent has exspired.  Utica made great
tools (torque wrenches, ratchets, etc) and finally had to merge with
Bonney (Utica-Bonney), but even together, they still couldn't survive.
It's been awhile since I've bought pro mechanic's tools, so I don't
know who all the current players are.  I know some quality brands are
still around like Channel-Lock, Crescent, Klein, etc.  If my latest
3/8" drive ratchet is any indicator, Allen tools, also.  Oh, and don't
forget Mac, every bit the equal to Snap-on.

nb