Laser-engraved business cards

I decided to make myself some laser engraved business cards today. These are oversized in nearly all dimensions, being almost exactly 3" x 4" and about 1/8" thick. Basically, these are designed to be very impressive, and I think they fit the bill. These were made with my usual double-sided engraving technique, with a twist. Instead of engraving a front and a back side by side, I engraved fronts and then backs, enabling me to use dithering on the backside, and a double-pass multi-depth effect on the front.