In early 1944, the Office of Strategic Services purchase 1,000 specialized pocketknives made by Schrade. Instead of regular blades and tools, these were lock picking knives, with one small blade, three different picks, and two rakes. Able to easily pass as a normal pocketknife on casual inspection, nearly all of them were issued out to OSS Secret Intelligence agents across the European, Mediterranean, and Far Eastern theaters of operation. Today only a few are known to survive…

OSS Equipment Catalog from Headstamp Publishing:
https://www.headstamppublishing.com/purchase/p/oss

CIA Equipment Catalog from Headstamp Publishing:
https://www.headstamppublishing.com/purchase/p/cia