These wild and crazy, bouncing targets allow you to practice moving your aim as it outrageously darts in any direction when struck. The 3-D shapes provide a side to aim at, no matter how it bounces, tumbles and rolls after each hit. DuraSeal material is constructed of a non-metal, self-sealing material that handles hundreds of rounds, yet still keeps its shape to provide hours of engaging shooting fun. For best results, set it on a flat area, clear of long grasses and other debris. Handles .17 caliber up to .50 caliber rifles or handguns. *Not for use with air rifles, pellets, BBs or sub-sonic ammunition.