Now here's a brilliant example of lateral thinking...
Photography hobbyist and industrial designer Jordan Steranka has published images of a new concept tool called the Aperture Wrench, a wrench with a design inspired by a camera’s diaphragm. Unlike an ordinary wrench, the Aperture Wrench features blade-like elements that open and close via a rotating wheel and lock in place with the press of a button.
Steranka’s goal was to design a wrench that could be adjusted to fit any nut size, removing the guesswork involved in finding a correctly-sized wrench. The end result is a tool with aperture blades, an adjustment dial, a locking button, and a built-in light for better visibility. As with any concept, though, it's possible the design will never make its way into mass production.
...not yet in production though...
The only drawback I see is the 'head' is quite large and may restrict its use in tight spaces....cars especially...
Steve A.