Fins, Hardware and Tools

Futures, FCS, Single Fins
The most common surfboard fin systems (Futures, original FCS, Bahne/US Box) use metal grub screws or screw/nut combinations to stay on your board.
Hardware gets worn or lost the more you use your board. Replacements are not hard to find. Surf shops will have grub screws, slotted screws, and nut plates on sale or extras for free. Avoid hardware stores.
The more often you rinse your board and hardware after a session the less likely your fins will get stuck. Key driver tools should be replaced if they get loose or worn to avoid stripping the head.
Single Fins
Single fins stay tight using a pin through a slot in the fin box and are secured using a screw and square plate. A small amount of epoxy can be used to keep the pin in place.
Futures Fins
Futures fins feature a single hex head grub screw that fastens the fin into the box with an allen or hex key.
FCS Fins
The original FCS system uses two grub screws, one for each tab and an allen or hex key to secure them.