FAKE !!!!Looks like a blade to cut polyurethane The nickel surfacing from where they have ground +(burnt Oil residue from dirty fingers) it gives it away and its probably set on the board with magnets.. Funny pic though !
Apparently helps you 'cut' into your bottom turns better...
I tired it once but it made me 'saw'...
Billy was really 'cut' up about his mates new board..
FCS says that it 'cuts' through all the techno BS about fins..
Now that that he has his fin saw down pat, he's going to work on getting on the 'plane'...so he can 'hammer' some waves...and 'nail' some new moves... then he can 'glue' it all together at the next gathering of woodwork and windsurfing.