The Extreme Max 3006.8629 Ball-Mount Omnidirectional Adjustable Rotating Fishing Rod Holder is designed with a ball-mount socket that allows for infinite fine tuning capabilities when setting your rod. Its universal styling allows it to fit most rods and reels with a twist on/twist off rod lock. The base attaches to any flat surface or track base, such as a boat gunwale or the Extreme Max aluminum Slider Base and nylon Slider Trax series bases.