Product Specification Size: One Size Material:         Iron Color: Silver Sport: Track & Field Brand: PORT A PIT Cast iron weight shot Great for high school/middle school practice Priced to fit your budget Determination of the correct diameter is based on the fingers being in proper throwing position placed behind the shot The shot must rest on the pad of the palm and the fingers must be up the side of the shot Biomechanically speaking, the larger shots have a greater contact area and push zone