Intro to Millwright Practice Exam 2026 - Free Millwright Skills Practice Questions and Study Guide

Impact wrenches utilize a hammering motion to tighten and loosen fasteners effectively. This tool combines a rotational action with a series of rapid, high-torque impulses produced by a hammer mechanism. When the impact wrench is engaged, the internal hammer mechanism strikes an anvil, generating a strong twisting force that allows bolts and nuts to be tightened or loosened with minimal effort.

This hammering action is what provides the tool its effectiveness in breaking loose stubborn fasteners that may be rusted or over-tightened. Moreover, the repeated impacts deliver substantial torque without requiring continuous pressure from the user, making it much easier to work with compared to other tools that rely solely on rotational motion. The design of the impact wrench is specifically meant to maximize efficiency and torque output through this distinctive hammering motion, which is essential for applications in construction, automotive repair, and various manufacturing processes.