Supercheap Auto had a special on this weekend for Impact Sockets. These are meant for rattle guns, but are ideal for tough nuts because they are 6 sided rather than the usual 12. The latter will round off a difficult nut. I had paid $22 previously for the 17mm one for the rear axle. This is a set of 10 metric 1/2" drive deep sockets for $51. I had a $5 loyalty discount, so got 10 sockets in a metal box for just twice the price of one.
Again, it's not Snap-On, but I doubt I can break them- they're solid.