impact wrench
impacter , also: impactor

In such cases a breaker bar or repeated blows from an impact wrench can be used to free them.

These are good for high performance spray painting and with impact wrenches and sanders.

If high levels of torque are desired an impact wrench should be used.

Sounds like the Devil's own impact wrench when it fires, and no one in the area that day heard anything like that.

Another air powered tool is the impact wrench.

Compressed air is the most common power source for impact wrenches, providing a low-cost design with the best power-to-weight ratio.

Most impact wrenches drive the hammer directly from the motor, giving it fast action when the fastener requires only low torque.

Hydraulic impact wrenches have the advantage of high power-to-weight ratio.

Otherwise impact drivers and impact wrenches operate in essentially the same fashion.

The tool limits on the crew are two impact wrenches, one jack, and two cans of gasoline.