Air-powered drills and drivers operate on a compressed air supply to rotate interchangeable bits in holemaking and fastening applications. Air-powered tools are typically lighter than corded or cordless tools, helping to reduce operator fatigue when used for long periods of time. They have fewer moving parts, so they tend to run cooler and have a longer lifespan than corded and cordless tools. Air-powered pistol-grip drills position the user\'s hand behind the bit-holding chuck to keep the tool steady and control the amount of pressure applied to the bit during drilling and driving. Air-powered inline and right-angle drills have a straight body for gripping the tool and applying pressure to the bit during drilling and driving.