as Ironraven commented... I've used my "US Speaker" P38 more as a screwdriver or other tool than it has opened cans... today it is a nostalgia item...a rite of passage to open a C ratiion can of ham and lima beans, wrong side up to find a layer of cold ham fat....I've had one on a key chain since 1971, compliments of the chow hall at Torii Station, JSPC, Okinawa...