Hunters and soldiers often carried these devices to keep their locks dry. For instance, on January 29th, 1759, General Jeffrey Amherst, Commander-in-Chief of British forces in North America during the French & Indian War, gave an order that every man should be well clothed and equipped with a good firelock, powder horn, shot bag, cover for the lock of his gun, three pounds of ball fit for his gun, and a good blanket. The "cover for the lock of his gun" mentioned in the order is what we now call a cow's knee. Our Lock cover is hand-made from bovine leather. It measures approximately 8 1/2" long and 8" wide.