A 24 Trolling Bar allows you to fish as many as four rods at the same time. This system includes four Li'l Pro rod holders, a star base with stainless steel mounting screws, 1/2 -diameter locking stem, lock sprocket and clamp bases that fit 7/8 -diameter round rails. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Rod Holders.