A 20-gallon air compressor is big enough to use with air tools, or even to paint a door or fender, but still small enough to be portable. It's getting towards the larger size of oil-free compressor, ...

Portable air compressors power a variety of air tools, including inflators for tires, finish nailers for carpentry projects, and impact wrenches for auto work. Unlike full-size air compressors, these ...