The Mac Tools 1/4" Reversible Composite Keyed-Chuck Air Drill ADC1400 is a high-quality air tool designed for automotive use. This pistol grip air drill features a 1/4" chuck size and a keyed chuck key type for secure bit retention. The reversible feature allows for easy bit changes in both directions, making it a versatile tool for various drilling tasks. With a sturdy construction and reliable performance, this Mac Tools air drill is a valuable addition to any automotive tool collection.