The Cornwell Tools CAT250 3/8â Reversible heavy duty Air Drill is a high-quality and reliable tool designed for automotive and industrial applications. With a chuck size of 3/8 inches, this single item air drill features a reversible feature that allows for added versatility and convenience. Manufactured by Cornwell, a trusted brand in the industry, the CAT250 is known for its durability and performance, making it a valuable addition to any toolbox.