nostr:npub1snzc8thwrfz9d7nh6x78f0pkfwydua6y0qkex60h3p832zh6vrhqed9daz 
it's a physical card. both the public address and private key are engraved on it by the factory :ChenShrug: 

others pointed out there instead are DIY hardware wallets that are safe.

https://brotka.st/media/7885a3c47987d3bcb192a5955a9c851c5e38c028be7e7033a448d8cdb094fc3b.jpg