Invention and Engineering

Adjustable spanner

An adjustable spanner (UK), also called a shifting spanner or shifter (Australia and New Zealand) or adjustable wrench (US and Canada), is any of various styles of spanner (wrench) with a movable jaw, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener size, as with a conventional fixed spanner.

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See also

• ▸Economy of Ohio
• ▸Allium carinatum
• ▸Electric light

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