How do on-metal NFC tags work?
NFC Tags in all shapes and sizes (see comment) : r/NFC
5PCS Anti Metal NFC Tag 25mm PVC Material With 3M Sticker NTAG213
Industrial Tag NTAG213 - Seritag
Anti-Metal NFC Tags for application on Metal Surfaces - Shop NFC
China Customized NFC Metal Mount Tag Suppliers Factory - NFC Metal
NFC On-metal Tags
NFC Tag Smartrac Block On Metal
Printed On-Metal PVC Disc - Seritag
A beginner's guide to learning what an NFC tag is - Xinyetong
Bar Tag - Seritag