Ultimate Arms Gear 3 Pack of TRT Tap Rack Dry Fire Safety Training Aid 9MM cal Pistol Magazine Dummy Ammo + Pack Of 10 Yellow ST Action Pro 9x19mm Parabellum NATO Luger Nickel Case Cartridge Package Includes: 3 Pack of Tap Rack Dry Fire Training Aid + Pack of 10 Yellow ST Action Pro dummy Ammo TRT loads into an empty pistol magazine. Perfect for use during dry fire training. Keeps the magazine follower positioned so that it will not engage the slide stop of the pistol. Designed such that the slide of the pistol can pass over the TRT without stripping it from the magazine. 3 Pack of 9MM. USA MADE. Pack of 10 - Trainer 9mm Luger / 9x19mm / Parabellum / NATO cartridges are inert dummy rounds used for training and instructional activities. Each Round Uses A Solid Brass Case So There Is No Chance of Rim Breakage.