About this 3D model

This is a little NFC Keyfob that hides a little NFC disk inside. The print profile pauses at .6mm to allow you to slip one of these inside: https://amzn.to/3N4GXDh You can buy anything similar search for NTAG215. You can then write a “bookmark” tag with any NFC tag writer application such as NFC Tagwriter by NXP