With the FCS II system, the need for any screws or tool to secure the fins has been eliminated.

These side plugs have a 3 Degree angle!

FCS II fin plugs come with different angles.

Centre Plugs:

0 => for centre fins click here.

Side Plugs:

3 => for quad rear fins/longboard trailer fins in surfboards with soft concave
5 => for quad rear fins/longboard trailer fins in boards with deep concave or thruster side fins in boards with little concave
9 => for thruster side fins in boards with deep concave