What fins are compatible with this type of fin box

[Sassyc137]

New here gunna attach three pics of the three fin boxes on this board and wondering what brand fins are compatible please so I can buy some that will fit first time

[waikikikichan]

FCS 1 or other similar Twin Tab fins.

But that doesn't mean the factory FCS key wrench will work for those boxes. A lot of the Chinese knock-offs had bigger grub screws. So check first.

[Sassyc137]

Thank you