A variety of tools are powered by air compressors, and quality air compressors are useful for a wide range of personal and professional projects. Before purchasing an air compressor, you will want to consider what it will be used for most often, portability, and your preferred power source. Will a single-stage or a two-stage compressor better suit your needs? Single-stage compressors are the most popular for use in one’s home or personal workshop. Once the air pressure rises to the specified level, the machine will turn off. You will be able to use this compressed air until the tank pressure falls below the desired level. At that point, the machine will restart to rebuild pressure.