Caldwell Duramax Self Healing Square Target - The Caldwell Duramax Self Healing Square Targets are self healing which allows you to shoot them thousands of time. Made of Ballistic Polymer for maximum durabilityTargets are self-healing. Shoot them thousands of timesRated for pistols or rifles from .22lr all the way up to 50 BMGReactive targets; bounces, rolls, spins, or flips when hit