The Astro Pneumatic 510AHT Reversible Angle Head Air Drilll is a professional-grade pneumatic tool designed for high-speed applications in tight and angled spaces. Part Number: 510AHT. The Astro Pneumatic 510AHT Reversible Angle Head Tool can also be referred to as angle impact wrench, right-angle pneumatic wrench, 3/8" air ratchet tool, angle drive air tool, and compact air angle head driver.