Portable Throwing Circle | Throws ProPerfect for practice on any surface, the Portable Throwing Circle is a versatile training tool for shot put, discus, or hammer. Designed for portability to create a temporary throwing circle quickly. The circle consists of lightweight 3 4" thick foam segments that easily lock together with a secure interlocking system. Set up takes only minutes, with no tools required, making it ideal for coaches and athletes who want to maximize training time. Key