An air compressor is used to power air tools such as spray guns, air sanders, air wrenches, air hammers, and much more. While not as widely used, air tools are more powerful than traditional electric power tools. Air tools offer more torque and RPM than electric tools not to mention that they are significantly lighter (since they do not have their own individual electric motors) which makes them much easier to handle. Air tools are also less expensive, more versatile, and longer lasting. Overall.