There are three types of impact wrenches:
2) impact air wrench
3) impact electric wrench
Each one has advantages and disadvantages. The Impact air wrench is the most powerful of the three. But has the disadvantage of needing an air compressor to use it. Which is not always available.
The electric impact wrench has power and can be plugged in anywhere. But you need to have access to power.
The impact cordless wrench doesn't have as much power as the two previous ones but can be used anywhere without power or air compressors.
The disadvantage of the cordless version is that the battery pack tends to make it very heavy.
Til later
For more info and reviews just check : http://impactcordlesswrench.net
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