Features and Benefits: Differential mounting adapter mounts easily using existing bolt patterns. Fits the most common differentials currently in use on Category 7 and 8 Heavy Duty Trucks. Including: Eaton, Fuller, Rockwell, Meritor, Spicer, International, and Mack.; For use on OTC5019A / OTC5078 and Stinger OTC1522A Transmission Jacks.; Made in the USA;