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impacter

or im·pac·tor

[im-pak-ter]
noun
  1. a person or thing that impacts.
  2. impact wrench.
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Origin of impacter

First recorded in 1915–20; impact + -er1

impact wrench

noun
  1. an electric or pneumatic power wrench with interchangeable toolhead attachments, used for installing and removing nuts, bolts, and screws.
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Also called impacter, impactor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018