[prova_modena]

The best quality traditional style adjustable wrenches I am aware of are made by Bahco. They are made with tighter tolerances than typical Home Depot grade stuff, which reduces slipping and damage caused by jaw movement.

https://www.bahco.com/int_en/products/wrenches/adjustable-wr...

However, I prefer the Knipex pliers wrenches mentioned by other commenters. They are also useful for many other gripping, pressing and bending tasks that the traditional adjustables cannot do.

Edit: For vise grip type tools, Grip-On is the best value/quality. They have a slightly different release mechanism than the Vise-Grip branded tools that improves the ergonomics of the tool significantly. They are (or were last time I checked) relabeled by some high end tool brands like Snap-on. For the most part, I consider them an inherently destructive but sometimes necessary tool that will mess up a fastener. However there are a wide variety of jaw styles (and removable covers) available that can mitigate this, depending on the task.

[nicoburns]

I second the recommendation for Bahco. I bought one of their adjustable wrenches on the basis that it would last, and I have no regrets: it's an incredibly well made tool.

For other options, there is a youtube video comparing different adjustable wrenches for strength (https://www.youtube.com/watch?v=cyOd05PUix4). The Bahco did indeed do well, although it was not the very best the tested.

[mauvehaus]

Whoa. I only knew of Bahco as a maker of saws and assorted woodworking tools. You just opened my eyes to the range of things they make. I'm going to have to get one of those if I don't go the Knipex route. Thank you!

[xorcist]

They not only make adjustable wrenches, they literally invented them (at least their modern form):

https://en.wikipedia.org/wiki/Adjustable_spanner