This is a space-saving holder for the Harbor Freight ICON line combination wrenches, specifically designed to hold the 14 piece (5 through 19mm) AND the 5 piece large (20-24mm), cause why would you have one without the other?

May fit other brands

To fitr on my smallish printer, I divided the print into two parts, and then included a flat key to fit into a pocket on the bottom that helps make a stronger glue joint. Look at the stl's it makes sense.