This is a rack to hold spade bits. The bits came with a rack that was designed to hang on a wall, but I keep these bits in a toolbox drawer. The original was designed to display the bits fore sale, so that they take up much more space than they could. Also the original rack require a bunch of space above the wall mounted rack so you can remove the bits.

This is a video of the design, slicing, printing and testing the rack. https://youtu.be/AFgSybbqr90 It shows the first prototype. The file included here has some tweaks that fixed some problems with the original design.