A kit of parts to make it so the trailer is hinged as well as replaces the forearms the hands can fold away for truck mode In robot mode it forms a massive and heavy hammer with a handle long enough to invoke the transformers animated ultra Magnus hammer design This can be printed in other color variations, just message me. What is shown is the navy blue, white, and silver color combination. It is a dark blue, white for the hammer core, silver for the handle pieces. The other color combination not shown is red where it's blue, and blue where white, and silver stays silver The forearm parts and other small pieces will be shipped inside of my version of a maker coin. Which works as a container and phone stand. Please let me know what color forearm replacements you require. Default is white. Siege uses gray, kingdom uses white, and shattered glass used navy blue If you have any other questions don't be afraid to ask, other people may have the same question