The sixth part included in each & every Exclusive Accessory Pack is the
Key To Vector Sigma!  Notice how we designed it to look more like it did in the original G1 cartoons rather than the Beast Machines shows, something we hope G1 fans appreciate.  

In addition to it being scaled (to the best of our ability) so it can be held by Thrust, Tankor... our favorite feature of this part is that it's "vacuum metalized" w/ a similar look to the Transmetal seen in Beast Wars.  In fact, every key has been "sputtered" in actual chrome (not aluminum like TFs) & given a yellow clear coat.  We chose chrome, because unlike aluminum it's a much darker and splotchy metal look adding to the ancient aura of this Autobot Artifact.