This item is player made using the construction skill.
Use this on a bed hotspot while in building mode to set it up.
You don't have to have the required level to set up a flatpack. It's sorta like having a folding chair to put in your house, it requires no skill. Of course, you won't get any experience for it either.
Make this on a workshop Steel Framed Bench, Bench with vice or Bench with lathe. You must have 53 construction to make this.