Check out this detailed explanation and demo of both how the Dynamis Blade functions and its key features.  This was a collaboration with Dom Raso (CEO of @Dynamisalliance) and Daniel Winkler (Master bladesmith).  The result was a full size extremely functional concealable blade.  Dom Raso made it a point to listen to all end-user feedback and dump it into this blade and its features.   With turning that over to Daniel Winkler, he nailed it.