The Kastaplast Stal is an overstable fairway driver. Zero turn with three of fade means it does not flip under power and always finishes left — the ending is fixed before it is thrown.
That makes it a wind and utility driver: forced hyzers, forehands, and tee shots that have to land left of where they were aimed. Four glide is deliberately low, so it comes down at the end of the fade rather than riding on. PDGA-approved in 2017, it is listed there under the Swedish spelling, Stål.
Nine speed with three of fade is unforgiving of a slow arm. Without the power to get it out flat, the fade starts early and the flight is short and steep.
How much the Stal turns and fades depends on how hard it is thrown. These three shapes are drawn from the manufacturer’s numbers, not from measured throws.
Measured by the PDGA when the Stal was certified. Each card names discs that share the number, so you can feel it in the hand.
