Definition of ring spanner in English:

ring spanner

Line breaks: ring span|ner

noun

A spanner in which the jaws form a ring with internal serrations which fit completely around a nut, usable in confined spaces.
More example sentences
  • And every home handyman has learned too that if you don't want your nuts chewed when tightening or loosening them, there's nothing better than a set or ring spanner.

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