KrystaL One Black Fallon Sherrock History Maker. Dart Case from L-Style. This KrystaL One Case is lightweight and perfect for any player who likes to keep their darts fully assembled. It comes with a carabiner to attach to your belt, a wristband, and also a card holder.KrystaL One Pink Fallon Sherrock History Maker. Dart Case from L-Style. This KrystaL One Case is lightweight and perfect for any player who likes to keep their darts fully assembled. It comes with a carabiner to attach to your belt, a wristband, and also a card holder.