If it's a horizontal burner make sure it's not rusting from the inside out on the bottom and make sure it has a high limit switch for water temp or adjustable thermostat so it don't get too hot.
I've got a standard set in gearwrench and metric in blue-point.(not flex head, I hate wiggly wrenches) quality seems about same. They both seem to lock up if you over torque em though.
The older Snap-on dead blows did the same but the newer ones won't. I had one do it and they have me the new one on swap. I love it. And I call it the new style but it's been out for years now.
I use a CLC 5gal bucket caddy. Not sure of its model number, but it works great for me, only issue I have with it is it has too many pockets but I'm sure they have a model out there with fewer pockets.