When [Hand Tool Rescue] came across a 1919 patent for a one size fits all wrench, he couldn’t help but recreate it. Described in the patent as “a new, original, ornamental design for a wrench ...

Cars, kit furniture, a new lawnmower that comes knocked down and many other products are put together with nuts ... wrenches as you used to, both standard (often marked SAE) and metric sizes.