I have a few of the older snap on boxes that had the 'lifetime' warranty on them
I am not the original owner of most of them.
I called snap on 800 number and they have sent replacement slides no problem ( within the last year).
I have also had my SO guy replace slides for me, no problem.
One of the boxes I bought used had a crack in the metal (fatigue crack) so I asked the SO rep about what the warranty on that would be and he told me that because I am not the original owner, just weld it up and be done ( he knows I weld). When I bought the box I figured that's what I would be doing anyway so no big.
But he did tell me that is I need the slides replaced that's not a problem. I said ok, thanks.
About a week later he brought me a full replacement set of slides and I didn't even expressly ask for them.
On the other hand, I had a problem with a new box I bought from them. They ordered me a replacement box, no problems
Bob