Victorinox Swiss Army Mini Screwdriver Replacement 12 Pack (Survival Kit Accessory Fits in the Corkscrew of all Victorinox Knives) A.3643-X2 (Old Sku 34811)

This mini screwdriver is handy for eyeglasses tightening or repair. Essentially it is a jewelers screwdriver that you can carry in your SAK. If your SAK has a corkscrew to hold it then add it if your knife did not come with one.