The file '6.35mm Hex Bit Holder Tray Organizer 4×18 3D Printer Model' is (stl) file type, size is 26.0KB.
A remix of the original design. I removed the magnet holes, increased the hex hole size by .15mm, raised the slot depth by 2mm, chamfered all the edges, and expanded the holder to 4x18 slots.