Definitions for "IMPACT WRENCH"
Keywords:  wrench, pneumatic, torque, bolt, nuts
A wrench, usually powered by electricity or air, in which repeated blows from little hammers are used to generate torque to tighten fasteners. The torque applied to the fastener depends upon the time and the air pressure applied to the tool (for pneumatic wrenches). The torque applied by an impact wrench to a fastener is influenced by the joint stiffness.
A power tool commonly used by erectors to tighten the nuts and bolts when erecting a steel building system.
A pneumatic device used to tighten nuts on bolts.