This model is made to hold every single tool and item you got with the purchase of your ender 3 v3 se, but since most of us also expand our toolkits elsewhere, I wanted to make this toolholder customizable and versatile. There are premade slots for all original tools (and a slot for a standard scraper). On top of that, the model makes use of an insert that you can modify to hold your own tools (I use mine for a folding knife, a deburring tool, and a set of nozzle needles). There is also a built-in drawer, and a shelf that can be used for any tools you may have (I use mine for a bottle of screen cleaner, a lighter, and a few extra sd cards, but you could also store spare parts, or any extra tools). The holder attaches around the printer's left “foot” and follows the natural shape of the machine. The top part with the shelf is supposed to be glued to the bottom to avoid the use of supports.