"Give gear holders in your kayak maximum adjustability with the Scotty Gear-Head with Track Ball Mount. The included, low-profile track stays out of the way on your kayak until you need it. When the holder is in the track, to adjust, just twist and slide to find the perfect ergonomic position. Ball-joint construction allows adjustability, so it smoothly moves right where you want it to, then tightens down to stay in position. Corrosion-proof, Scotty-quality construction is safe for saltwater use. Track: 1.75""L x .375""W. Mount: 9""H. Gives gear holders in your kayak maximum adjustability Low-profile track stays out of the way Simply twist and slide to adjust mount's position Ball-joint delivers smooth adjustability Corrosion-proof construction"