Pneumatic tools are powered by compressed air supplied by an air compressor. They are also known as air tools, air-powered tools, or pneumatic-powered tools. Pneumatic tools can also be driven by compressed carbon dioxide stored in small cylinders, allowing for portability. Most pneumatic tools convert the compressed air to work using a pneumatic motor. Compared to electric power tool equivalents, pneumatic tools are safer to run and maintain, without risk of sparks, short-circuiting, or electrocution, and have a higher power-to-weight ratio, allowing a smaller, lighter tool to accomplish the same task. Furthermore, they are less likely to self-destruct in case the tool is jammed or overloaded.

Some common types of pneumatic tools include impact drivers, air oil pulse, impact wrenches, air drills, ratchet wrenches, air grinders, and screwdrivers. Pneumatic tools have many benefits, including being inexpensive, safe to use, easy to operate, portable, and having low theft rates. However, one of the primary disadvantages of pneumatic tools is the need for an air compressor, which can be expensive. Pneumatic tools also require a little more maintenance than electric tools do, with the need for regular oiling to prevent rust and lubricate their inner workings.

In summary, pneumatic tools are powered by compressed air supplied by an air compressor or compressed carbon dioxide stored in small cylinders. They are safer to run and maintain than electric power tool equivalents, have a higher power-to-weight ratio, and are less likely to self-destruct in case the tool is jammed or overloaded. However, they require an air compressor, which can be expensive, and regular maintenance.