Check the listing for details. P-51 & P-38 20 Pack Can Opener Shelby USA Military for Mess Kit Survival Camping. Condition: New. Listed at 17.90 USD. FREE & FAST SHIPPING; USUALLY MAILED SAME DAY Sale for a 20 pack, all stainless steel includes 10 each US Shelby P-38 Can Openers 10 each US Shelby P-51 Can Openers Great for campers, scouts, hobbiest , door prizes at VFWs, Legions, veteran organizations. See other listings we sell these from 5 to 500- The P38 was used from WWII through Vietnam for C-Rations and today for hiking, camping, day trips, keep on your key chain, glove box, inside your purse, pack, bag, etc. The P51 was a civilian adaption that came along later and has enjoyed similar success.- These are current production, constructed from magnetic stainless steel, just like those in WWII and later. These are not the cheaper zinc plated steel imports that are stamped "Mil-J-0837"FREE & FAST SHIPPING; USUALLY MAILED SAME DAY Sale for a 20 pack, all stainless steel includes 10 each US Shelby P-38 Can Openers 10 each US Shelby P-51 Can Openers Great for campers, scouts, hobbiest , door prizes at VFWs, Legions, veteran organizations. See other listings we sell these from 5 to 500- The P38 was used from WWII through Vietnam for C-Rations and today for hiking, camping, day trips, keep on your key chain, glove box, inside your purse, pack, bag, etc. The P51 was a civilian adaption that came along later and has enjoyed similar success.- These are current production, constructed from magnetic stainless steel, just like those in WWII and later. These are not the cheaper zinc plated steel imports that are stamped "Mil-J-0837"