The MAC Tools AD540 3/8" Reversible Drill is a high-quality pneumatic air drill designed for automotive maintenance and repair. With a maximum speed of 1800RPM and a chuck size of 3/8 inches, this single item unit is great for various drilling tasks. The pistol grip design and keyed chuck key make it easy to use, and the reversible feature adds versatility to its functionality. Made by Mac Tools, a reputable brand known for producing reliable automotive tools, this drill is a durable and efficient addition to any workshop or garage.