The Kastaplast Rask is a "faster disc."
This very overstable driver has a unique inner ridge on the bottom flight plate that is designed to reduce drag. This bump is located a fingers width away from the inner rim.
Kastaplast gives the Rask a speed rating of 14. This is a disc that power throwers can put everything into without it turning over.
Flight Numbers: 14, 3, 0, 4