On the Pro Series weight distribution system # PS49901 the ball is already installed and torqued to spec so no worries! I have linked a video featuring this system for you. view full answer...
The Curt Trunnion Style Weight Distribution System part # C24UR does come with the pictured shank. The only thing it does not come with that you will need is a hitch ball, part # 19286 for 2-5/16". view full answer...