The RAM® Track Ball™ Quick Release Base - C Size (RAP-383U) creates a reliable mounting point designed to universally fit a wide range of common and proprietary track systems, including YakAttack GearTrac, Scotty Slide Track, and Harmony SlideTrax. With a simple twist of the ball, you can instantly loosen or tighten the base, making it easy to slide along the track and quickly reposition your fishing accessories. Featuring a C size 1.5" ball, it pairs seamlessly with any RAM® C size arm and device holder. For anglers, it’s an ideal foundation for mounting fishing rods, action cameras, fish finders, and transducer arms.