I only have two hands! This is why we have locking pliers. They’re pliers, usually adjustable width, that can be locked into place using an “over-center” action. That means as the jaws of ...

A few examples are: locking pliers, bicycles, oil well pumps, loaders, internal combustion engines, compressors, and pantographs. In biology we can also find examples of this linkage, as in the ...