To begin, open the 3D model of the holder in a slicer program compatible with a 3D printer. Create a print file that can be read by the 3D printer, ensuring it is saved as a G-code file. Using a memory card or a USB stick, activate the print file on the 3D printer.
Once the holder is printed, wait until it cools to room temperature. Remove the plate the holder sticks to from the printer. Bend the plate slightly until the holder separates from the surface.
Lastly, remove all excess threads or attachments from the holder.