Finbox - FCS Fusion 9 Degree
The Fusion Finbox by FCS was designed with the ultimate quality and strength in mind. This is by far the easiest fin system to install and is designed to install under the fiberglass of any surfboard.

The finbox has a base of high density foam. This helps disperse any forces on the plug. It provides a solid base so the plug does not rotate or sink into the foam.

The slots in the Fusion plugs are slightly elongated which allows slight fore and aft movement of the fins, this is great for fine tuning the performance of the board.