NOTE The use of the terms “tool” and “machine” could be confusing in the field of pneumatic power tools. “Pneumatic tool” is used for hand-held machines and “pneumatic machine” for larger machines, often suspended or mounted. However, “tool” is also used for the inserted drill, file, chisel, etc. which is fitted to the machine spindle. In order to differentiate between pneumatic tool and inserted tool, the term “power tool” can be used for the former.