Adjustable spanner
![Adjustable spanner](/Images/godic/202412/20/Adjustable_wrench.svg3518.png")
![From the bottom: 1. The first adjustable wrench from 1892 (Enköping Mekaniska Verkstad)2. Adjustable wrench from 1910 with an improved handle (BAHCO)3. Adjustable wrench from 1914 with a slightly rounder handle (BAHCO)4. Adjustable wrench from 1954 with improved handle and new jaw angle of 15 degrees (BAHCO)5. Adjustable wrench from 1984 and the first with ERGO handle (BAHCO)6. Today's version of the adjustable wrench from 1992 with ERGO (BAHCO)](/Images/godic/202412/20/Adjustablewrenches3518.jpg")
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.