Single key card for wallet

thingiverse

I adjusted the dimensions to suit my wallet: shrinking its width and length, trimming 1mm from the back to make it thinner, and carefully carving out decorative "slices" to reduce weight. At the top, I made a notch for easy grasping with my fingernail. Additionally, the original key's wider top was modified by cutting away some material so it would fit snugly into place - fortunately, this tweak allowed the key to snap perfectly into position.