The Fleet Safety Razor Blade by The Dominion Steel Corp. Ltd. of Sheffield. An individually wrapped razor blade that has been magnetized so that when suspended by a thread in a glass of water it would act as a compass for escape and evasion purposes. These were issued in packs with other blades but only one blade per pack was magnetized. Various different brands were used including 'Fleet' & 'Dawn'. Light rust staining to blade otherwise in very good condition. Stock code E18231.