These are replacement arms for your Kreon Minifigure. These arms add an elbow joint as well as a more flexible shoulder joint to the Kreons. The upper arm snaps onto the Kreon's existing shoulder ball joint - it's meant to fit tightly. The forearm is attached to the upper arm by using a paperclip as an axle (not provided). The existing Kreon hand fits into the 3mm port on the forearm and the shoulder cap fits over the shoulder joint, but is optional.
$if you plan on ordering multiple items of mine, contact me first and I can group them into a single order to save you a few dollars.$