Caldwell's Game Series AR500 Steel Targets come in 4 different popular game silhouettes for competition practice and recreational use. Constructed using 3/8" AR500 the finest rifle rated target steel available on the market capable of withstanding thousands of rounds. 1/2" x 1" center slot is compatible with the Caldwell AR500 Target Post. These targets are rated up to 3000 fps impact velocity 3500 ft-lb impact energy and are covered by a lifetime guarantee."