Pack of 10. Developed for Military and Law Enforcement Use - Brass case with ABS Plastic Insert Makes the Round Highly Visible. Popular with Many Departments and Agencies for Use In Immediate Action Training for Just That Reason. Completely Inert Dummy Training Round. Excellent for Classroom Training, Loading/Reloading Drills, Gun Handling Drills, Malfunction Drills and Diagnosing Shooting Problems. Each Round Uses A Solid Brass Case So There Is No Chance of Rim Breakage. Made by ST Action Pro.