The stock plastic handles on my 80's Marshall 1960A 4x12 cabinet were pretty much one gig away from desintegration. Ever since I moved on from boots to sneakers the risk of a blue toe gets more and more real each time we unload the truck for another gig.
Now more important: we don't want to be a rocker that contributes to the plastic soup out there don't we? That's not cool man...
Anyway, after I replaced the handles with these sturdy babies, I'm a happy and ecological responsible rocker with healthy toes for amazing moves.
All this is very important because I still suck at guitar but hey... these sweet handles make it all worthwile!
They didn't retrofit because they are bigger than the stock handles but there were no worries cuz I am the proud owner of a multitool.
Uhm, yeah just buy them.