Caldwell resetting targets are easily portable and create an interactive shooting experience that makes plinking and target practice fun. Made of heavy duty steel, these targets are built to last. The bottom row of targets swing up and out of the way when hit. Shooting the top target will reset the bottom row. Not for use with BB's or non-lead pellets. Made for up to 45 ACP, 44 Special 1/2 inches thick steel rod frames 3/8 inches thick steel metal shooting plates