Fury Tactical Dragoon II Folding Knife
The Fury 32221 Dragoon II from Joy Enterprises is often termed as a butterfly tactical, however, this is not a butterfly.  Instead the Dragoon is a safety knife with a unique blade lock handle.  Release the clasp, pull forward on either handle and the handle rejoins its mate to reclasp and turn your folder into a fixed blade.  Much easier to use than a butterfly and safer when closed or open.