OTC's Internal/External Standard Threaded Adapter features high strength metal construction. Use on the ends of Push-Puller legs or forcing screws when pulling shafts, bearing caps, pinions, etc. Internal end (attaches to Push-Puller legs) is threaded 5/8-18. External end features 3/8-16 male threads. 2-1/4 inches long. Value is at the core of the OTC tool and equipment portfolio. Whether it's a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.