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It is a "reamer with sewing eye", according to Victorinox (PDF). It is used for punching holes in leather or canvas and can also used to get a thread through the hole, according to SAKWiki
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It is a "reamer with sewing eye", according to Victorinox (PDF). It is used for punching holes in leather or canvas and can also used to get a thread through the hole, according to SAKWiki