These new flip targets are designed for rifles firing upto 16 joules or 12ftlbs and will last more than 2000 shots! The flip-target's working principle is quite simple. With every hit, the target rotates around its centeral axis and rolls over 15cm. After that, a new impact zone will stand up, ready to be shot. This is not suitable for firearms or airguns with more than 18ft/lbs of power. These are designed to be used with lead airgun pellets only.