The Tannerite Single Case of 1 Pounders are the original binary reactive rifle targets to enhance and bring an exciting effect to target practice. The one pound targets are packed 10 to a case and supplied as two powders that are then carefully combined to produce an explosive target. Once you've made a direct aim and have fired at the rifle target the high velocity of the bullet will then cause a large explosion and a cloud of water vapor. With each Tannerite product instructions are included and should be read carefully before use to avoid bodily injury.