Help eliminate sector fouls. Lay out the correct sector for any throwing event. Comes with an all-weather vinyl template-7′ in diameter to fit within both the shot put and discus circles, 2 durable sighting rods, 3′ each in length to help in laying out the longer sectors. Easy to read instructions and diagrams on how to measure and mark the various sectors. Template is lined for shot, discus, hammer, 35 Lb. weight throw & javelin.