Alexandre Haftman Bouteloup

Hello :)

Supermarket cart wheel blocker to prevent rotation on the vertical axis of the cart wheel.
The top part of the part fits a personal mobile robot chassis. I invite you to modify this part of the part to fit your needs.

But just in case, here is the complete part (including the support to the chassis), and the simplified version of the part that just surrounds the cart wheel that can be used for modifications.