The AmPro AR4131 is a professional air ratchet tool designed for automotive use. With a maximum torque of 50ft/lbs and a drive size of 3/8 inches, this ratchet is powerful and versatile for a variety of tasks. The air inlet size of 1/4 inches allows for easy connectivity, while the maximum speed of 160 RPM ensures efficient operation. Manufactured in Taiwan, this high-quality tool is a reliable choice for any mechanic or automotive technician in need of a durable and effective air ratchet.