This 3u 3x1 Gridfinity bin holds the two screwdrivers that were included in the Elegoo Centauri Carbon tool kit that came with your printer.  It holds them both flush so they can be stacked on, and includes a finger recess so you push on the tip of the screwdriver and they'll pop up for easy removal.  It also includes a hole for each of them so you can easily store them while in use.