The OTC Ball Joint Connected Adapter Starter Kit is a professional-grade tool designed for the removal and installation of ball joints, U-joints, wheel studs, and more. With a patented connection and adapter design using spring-loaded stainless steel ball bearings, this kit securely attaches cups and adapters to the C-frame and forcing screw. The starter kit comes with 7 cups and adapters, while the Professional Kit option offers 25 cups and adapters for over 600 vehicle models, making it a versatile and efficient tool for automotive maintenance and repair.