This is how tools came before Snap-on.
If this is a reference to the invention of interchangeable sockets and handles, Snap-On does not own that honor. Mossberg does. Walden and then Blackhawk were also making pressed steel detachable sockets and standard handles well before Snap-On, all modeled on Mossberg's design.
Snap-On was not the first manufacturer to use a mechansim on the drive stud to limit the travel of the socket on the handle, either. That was Blackhawk, which patented and trademarked the technology (stop-pins) as "Lock-On." That led to the tabs, fixed balls and detent balls that would become an industry standard in locking sockets in place.
Granted, Snap-On built their entire business on interchangeble sockets, and they have inarguably been the most successful at perfecting it. But they were not the first.
Don't get me wrong. I like Snap-On as well as the next guy. But the mythology that surrounds its popularity tends to overshadow or ignore the historical facts sometimes.