These are TAPCO Chamber Flag Safety Tool Shotgun. The Chamber Safety Tool for the shotgun is specially designed to fit in the chamber of your shotgun. As a chamber flag, this tool’s yellow color clearly shows that the weapon is unloaded. Comes with a strengthened head for increased durability. In addition to serving as a chamber flag, the flattened edge on the corner of the head allows you to adjust the windage and elevation of your scope. (6 Per Pack).