The one item that almost no mechanic can do without is the impact wrench.  With myriad different uses, from removing a wheel through to performing a full engine break down, wrenches are a tool that mechanics will find themselves using every day.  While air powered versions are practically ubiquitous in the professional workshop, the fact that they require a supply of compressed air means that they are not always ideal for a home environment.  This is where the electric impact wrench comes in.

An electric impact wrench can perform many of the same tasks as the air powered version, but is a much more convenient proposition for domestic mechanics thanks to the fact that it does not require a supply of compressed air to operate.

Electric impact wrenches are able to carry out most, if not all the tasks that you are likely to ask of them, and offer a smooth delivery of power that makes easing a tight nut simple. 

One reason why air powered impact wrenches are so popular is because they are extremely light weight and offer incredible torque in use.  The use of air power to push a motor means that the heavy components required for an electric impact wrench are not needed.  This makes the wrenches much more comfortable to use over long periods of time, and means that workers can be more productive.

For domestic use, there is not the same necessity to have the same lightness, because an electric impact wrench is not going to be used over long periods of time.  This reduces the advantage of a particularly light weight, and means that a home garage mechanic can get many of the benefits of owning an impact wrench without the additional costs that are sometimes required.

Air powered impact wrenches require an air compressor system to operate, and when the two units are combined, the cost can be