Compressors

Unlike most small compressors, which are self-lubricating, this pump uses oil, which has to be replaced every 300 hours of run time. The extra maintenance pays off because oil-lubricated compressors ultimately last longer, are more easily repaired, and typically pack more power in a smaller package. With its twin 20 gallon tanks, the 77-pound Hitachi capably handles high-demand tools such as paint sprayers, impact drivers and, shown here, the versatile Fein MultiMaster, a detail sander that can scrape, grind, or saw.

Compressor: 5.3 cfm at 40 psi; 4.4 cfm at 90 psi; 83 decibels; $280, Hitachi Power Tools

MultiMaster: 3.0 cfm at 90 psi; $220, Fein