Oh combined wisdom of the interwebs, please guide me.
I'm about to get a hex key set, and I have my eyes set on Wera.
There is this set
http://www-uk.wera.de/product_detail_uk.html?L=1&file=root_category_l-keys_l-keys_for_hexagon_socket_screws_950_spkl_9_sm_n&lang=en-UK
And this that is...