Part of my father in laws estate. I dont know air tools, so according to google -- Its possibly a Snap-on FAR72B 3/8" Drive Air Ratchet is a high-quality automotive tool designed for effortless tightening and loosening of nuts and bolts. With a maximum torque of 65ft/lbs and a maximum speed of 200RPM, this air ratchet delivers efficient and precise performance. The unit comes with an air hose fitting and a 1/4in. air inlet size, making it compatible with a variety of applications. Backed by the reputable Snap-on brand, this durable and reliable tool is a must-have for any automotive professional.