Mini Caliper, can be used both as a keychain or without a chain by inserting the pin.
If the moving part is a little hard, go back and forth a few times to unblock it.
This is the link for the chain that i used:
https://www.amazon.it/dp/B08L7PWSGZ?psc=1&ref=ppx_yo2ov_dt_b_product_details
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.