Mac Tools 1/2" Reversible Aluminum Keyed-Chuck Air Drill AD590. This versatile and durable air drill is perfect for automotive and industrial applications. Made with high-quality materials, it is built to last and provide reliable performance. Whether you're a professional mechanic or a do-it-yourselfer, this air drill is a must-have addition to your tool collection. Variable-speed trigger control. One-hand operation – forward/reverse. Includes Guide handle. Chuck Capacity 1/2" Free Speed RPM 800 Index Name Drill, Air Minimum Hose Size ID 3/8" Overall Length 7-1/2" Sound Level DB 90 Style Reversible Type Drill Weight 4 lbs