AAE's pre-formed aluminum throwing circles are designed for precise construction of concrete throwing pads, offering durability and accuracy. Made from aluminum extrusion, they feature exact diameters of 8' 2-½" for discus and 7'-0" for shot/hammer, with a vertical angle that serves as the 3/4" recessed circle wall. Available in 1" or 2" aluminum angles, these circles can be divided into halves or quarters for easier storage.