P51 Can Opener Shelby CO Made in USA 10 Each The P51 is the P38's big brother. They were originally issued with Multiple Serving Field Tray Rations. They will work with any sized can. The P51 and the P38 Can Openers are no longer issued yet are still popular with outdoor enthusiasts and still manufactured by Shelby CO, one of the original contract holders for the military. Great inexpensive item to keep in your Car, Boat, Bug Out Bag, ETC . Measures... 2" x 5/8"MFG ..........Shelby CO.Material ....Stamped Steel A09139