The PowerLineTM Club K® Fastpitch mat designed and patented by Cheri Kempf, premier Pitching Instructor, and owner of Club K®, the world’s largest training facility devoted exclusively to fastpitch softball. The ultimate training tool for athletes learning fastpitch softball pitching. Designed to withstand extremely heavy training schedules. The PowerLineTM Club K® mat is ideal for indoor facilities and gyms, and is also intended for outdoor use. Special Order Only: Call 1(800)613-8002