"Never get caught unprepared" was the motivation that led the Saedor Krupp R&D department into devising the Nailz FingerBlades. In its prototype phase, the fingerblades took a resemblance to a Swiss Army Knife, holding blades as well as assorted tools and even cutlery. But once it was installed in the first test subject the project had to go back to the drawing board: the necessary changes to the fingers severely restricted mobility and some of the tools caused incredible pain to extract.
In the final commercial version the FingerBlades consist of thin sheets of implant-grade steel that extend from sheaths are implanted under the nails of the user. With a simple electrical impulse, normally triggered by extending the fingers quickly, the blades extend. This latest version allows implantees to even use nail polish over their organic fingernails without disrupting the blades underneath.