Set of Three Bullet Pendants, Dogtag Necklace, or Key Rings 9mm, 45 and 223, Three Bullet pendants, three key rings, and three 24 inch Dog Tag Chains. Calibers: 0ne 9mm, one 45, and one 223. These are the most popular cartridges used in most common firearms. People love these bullets so they make fantastic gifts. Ideal for gun enthusiasts, hunters, military personnel, video gamers, paintball players