50Pcs Sliver Sublimation Metal Business Cards, Engraved Metal Business Cards Sublimation Blanks 3.4x2.1in Thicknes()

These metal cards are quite thin and flexible but they appear to be sturdy enough for their intended use. They are perfect for metal stamping and laser etching. However, it seems that they might not be suitable for chalk markers, as the surface is super shiny and smooth. Grease pencil might work, as well as whiteboard pens. These cards are also not suitable for use as product packaging in case an item placed on these cards requires a strong magnet, as the material is too thin. But, they are good enough for someone who wants to practice on them.