This cover uses mechanical gears in a gear chain to create a fidget toy on the outside of the case using the print-and-place method, a manufacturing marvel achievable solely through the precision of advanced 3D printing technology! I printed this on my[%7131633556]Ender3 Pro and also printed it on my universities K1 Max! I made a choice to use the print in place method for my cover design because i think it shows the unique designs you can make with a 3d printer especially for such an innovative product like the [%8009525620] AR glasses