10-pack Shelby Co. P-38 Can Openers
Manufactured in the US by Shelby Co. Originally issued in WWII as openers for C-rations. They're a very basic and failure-proof steel design. The flat edge can be used as a screwdriver. Each weighs 0.2 oz. P-38 Model number P-38-5-6879 (Opener Canned Ration).