Adjustable spanner

An adjustable wrench (US) or adjustable spanner (UK) is a wrench with a "jaw" of adjustable width, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener, as with a conventional fixed spanner. An adjustable spanner may also be called a Bahco (European usage), crescent wrench (US, Canada and New Zealand), adjustable end wrench (US), wrench, shifter, shifting spanner (UK, Australia), shifting adjustable, fit-all or adjustable angle-head wrench. ... In many European countries (e.g. France, Germany, The Netherlands, Portugal, Spain and Italy) the adjustable wrench is called an "English key" as it was first invented in 1842 by the English engineer Richard Clyburn. [Adjustable spanner. Wikipedia]