Rodmounts SUMO Vacuum Rod HolderSUMO can transport up to 6 rods of all types. Suction mounts can adhere to any smooth and non porous surface. Most cars have steel body panels, however there is an increase in the use of aluminum, plastic, fiberglass and carbon fiber. Suction mounts work great on windshields and sunroofs. You can check your car with a refrigerator magnet. Staggering or offsetting the rods so the reels dont interfere with each other provides more space. Suction mounts