Both examples hold 5 Dillon XL650 or XL750 Shellplates and are attached to the wall using 2 #8 wood screws or drywall screws.
See more info as well as download the design files at https://azjake.com/shellplate-holder
Available printed and ready to use at https://www.fgsengineering.com/product/dillon-650-750-shellplate-rack/
Printer Brand:
Creality
Printer:
Ender 3 Pro
Rafts:
No
Supports:
No
Resolution:
.16mm
Infill:
10
Grey