Diamond Hitch features the Inverta Ball design and a spring-loaded locking ball system. The Inverta Ball design allows you to easily remove the ball, flip it upside down and store it in the hitch, leaving the bed of the pickup unobstructed and flat. The lock to hold the ball into place is designed in the ball. No more reaching into a muddy fender well to pull a lever or release a lock or cable. The spring loaded locking system also eliminates any chance of forgetting to engage a fender well locking mechanism. A locking tab allows visual verification that the ball is locked into towing position.