From True Ames:
This is a minimal area fin with a fair amount of sweep and some trustworthy length in the base. Drawing long lines and smooth turns are an inherent characteristic of this fin. Designed not to flex, the projection comes from the rails and directional V-bottom on your board. We also have reports of this fin working quite well with other slippery equipment.
A true classic with some avid followers.
own it from $10 a week with More info