Three silver aluminum cards, a thin coat of marking spray, and our smallest laser. The SWIFT MINI engraved them one at a time, and the contour lines only connect when all three sit together. Ridge, summit, or falls: which one would you keep?#laserengraving #minilaser #metalengraving #atomstack #aluminum #lasermarking #markermaker #ATOMSTACK #SWIFTMINI #topographic #metalcard #anodizedaluminum