Pneumatic, noo MAT ihk, tool is a power implement operated by compressed air. Pneumatic tools have various uses. For example, dentists use air-powered drills to remove tooth decay. Automobile mechanics use pneumatic wrenches to tighten nuts and bolts. Construction workers use pneumatic hammers to break up pavement. In addition, the gas turbines in jet engines and the air brakes in heavy trucks and railroad trains are operated by compressed air.