The NAPA Professional Air Tools 3/8" Air Ratchet, model number 6-728, is a high-quality air tool designed for automotive use. With a maximum speed of 150 RPM and a drive size of 3/8 inches, this ratchet is capable of delivering up to 45 foot-pounds of maximum torque. The 1/4 inch air inlet size ensures efficient operation and airflow. Built by the trusted brand NAPA, this air ratchet is a reliable and durable tool for any mechanic or automotive enthusiast. Please look at the images carefully, because a good close thorough examination of the images can tell you so much more than I could describe with words. This air ratchet was tested before being listed.