The Kastaplast Stal is an overstable fairway driver and is named for its toughness. Stal, the Swedish name for steel, was once a common soldier's name.
K1 Hard Line is Kastaplast's super durable material with a nice combination of firmness and gumminess. Discs in K1 Line will appear in both solid and translucent colors. K1 Hard is similar to K1, stiffer. Just as with K1, this plastic comes in both translucent and solid colors.
