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Box-end wrench
/bˈɒksˈɛnd ɹˈɛntʃ/
/bˈɑːksˈɛnd ɹˈɛntʃ/
Box-end wrench
[NOUN]1
a hand tool with a closed-looped, box-shaped end that fits snugly around the flats of nuts and bolts, providing a secure grip and allowing for the application of torque during tightening or loosening tasks
synonyms : closed-end wrench