Crescent's new R2 RapidRench is easy to adjust, it locks securely, it ratchets in either direction, the jaws aren't impossibly large, the handle is rubberized for comfort, and best of all, it'll fit onto hex nuts, square nuts, and eye bolts no problem. The adjustment range is ¼
inch to ⅞
inch so it's not the universal answer, but it'll do for most of the nuts and bolts around your homestead.
inch, about $45; Crescent