I own two VWs. I went looking for the right sockets and bought this.

China made. Lifetime warranty from Autozone. Replaced free of charge.
Yikes! "Right sockets?" Good luck with that. Notice how the #12 necks down into the chrome so that manufacturer can save money on custom chrome holders? That neck down is a stress concentration, typically where those bits shear IME. I had craftsman allen sockets like that and that's where they broke. Hard pass.
I've never seen 4,5,&6 on a VW, but what do I know. I have mostly used 8, 10, &12. I've seen larger ones on seat belt bolts.
This is not a fastener type to mess around with, but maybe you will get lucky or maybe things have changed. Seriously, before I started a repair that involved using Chinese triple squares I'd ask myself:
1) If I shear this triple square's bit off, how will that impact this repair? Can I get another one in a reasoable amount of time? Will they be in stock? What will I do to continue the task? Is it likely the replacement will fail in the exact same way mine did? What are the chances a Chinese made product has gotten better over time such that the new one will funciton where the old one did not? In the past, not bloddy likely. Now? Wh knows.
2) If this tool destroys the recess in the bolt head (because its worn, undersized, misshapen, etc etc), how will I get this fastener out? Can I drill it? Grab the head with something? Weld something on? Grind the head off?
In fairness to Duralast, these are good questions to ask with ANY sort of cap head screw. With external wrench flats, I think we have more options if we round over the head. In my case, having been here before, I've had pretty bad experiences when something goes wrong with a cap head screw. That's why I have multiple sets of Snap on bit sockets in my tool box. And I replace bits or warranty the whole socket when and as they wear. Typically, the answers to the questions above are not good for me. I've had bad experiences.
If I had it to do all over again, maybe I'd have gone Hazet. I spent ALOT of time working on German cars and never seriously considered German tools. I think last I looked, they weren't cheaper than what I could get Snap on for. Now, I think Snap on are much more money and Hazet are more available.