This is the Hobie Cat ST Turbo Fin Kit V1 for 2008 and older Set Screw attachments in the sprocket.
Increase performance on MirageDrive equipped kayaks by 10% with the longer Turbo fins!
The kit comes with:
-Two ST Turbo Fins
-Two Turbo Masts with set screw ends compatible with V1.
-One tube of Loctite