This parts is Add-On parts for Transformers Lost Age Movie Advanced siries (Japan) Autobot Dino.
The conventional ankle parts of Dino are very small. Therefore it is very difficult to let you stand.
These parts are new ankle parts, and the grounding area of the foot becomes big.
Dino becomes hard to fall down by changing it to these parts and becomes easy to play very much.
In addition, you can transform these parts with attaching it.