Talon Nutgrip Titanium Cheeseborough Wrench
This specialized pocket tool from Titan Talon Tool Co. makes quick work of stuck wingnuts, and can also turn 9/16″ and 15/16″ regular nuts in its grip. It also has a built-in bottle opener and can hold 1/4″ hex bits as well. Small and light enough to keep on your belt loop. We also like their titanium key clip.