I use the 10" Pliers Wrench & Cobras. They are great for a wide range of jobs. I haven't needed the 12" versions, yet. I did buy the 7" Cobra pliers, and I love their size . I find myself using the 7" Cobras more often. They are small and light enough to fit in my pocket. It all depends on your trade I guess. I may buy the 12" down the road, IF I need them. Either way, they are great tools. Cheers.