Flare-nut wrenches are advantageous because they have more powerful gripping powers. It's 5-sided design makes it much more snug around different nuts. As a result, it is better at loosening or tightening nuts than the regular wrench. Flare-nut wrenches also tend to have shorter handles.

Are flare nut wrenches worth it?

4.0 out of 5 stars They're pretty good. I've used flare wrenches that spread open ... Flare nut wrenches are not something to cheap out on, but if you're gonna, these are pretty good at about 20% of the ones most pros use. I've used flare wrenches that spread open way too easily and round the fitting.

What are flare nuts used for?

During assembly, a flare nut is used to secure the flared tubing's tapered end to the also tapered fitting, producing a pressure-resistant, leak-tight seal. Flared connections offer a high degree of long-term reliability and for this reason are often used in mission-critical and inaccessible locations.