How it's made. A flat 4.5 mm plate made face-down, so the face comes off the bed glass-smooth. The numbers, the words, the barbell and a frame line are set 1 mm into the face in a second color, flush with the black; engraved cuts it all into one color instead. The back takes a slot-in stand (a separate piece), two keyholes for screws, or pockets for 10 x 2 mm magnets. PLA, no supports.