The Markwort Club K Spin Right Spinner in Yellow is a training aid designed specifically for softball pitchers. Made by the brand Markwort, this spinner is a versatile tool that can be used both indoors and outdoors to improve pitching technique. The set includes one spinner, suitable for all skill levels, and is ideal for honing pitches in a variety of training environments. Perfect for athletes looking to enhance their pitching skills before their next game.