or im·pac·tor


Origin of impacter

First recorded in 1915–20; impact + -er1

impact wrench

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