The 5ive Star Gear Can Openers are an exact copy of the originals that were first developed in 1942. They are a small can opener that was issued in the canned field rations of the United States Armed Forces from World War II to the 1980s. Originally designed for and distributed in the K-ration, it was later included in the C-ration. They make a great addition to any camping trip or survival bug-out bag.