You can use these on their own but I specifically made it to the size and shape to fit my JimiHome precision tool kit. 

I have included a Step file so you can edit it in the CAD program of your choice.

I have included the fusion360 file so you can edit it easily there. I have included parameters for all size adjustment but if you are going to use them with the jimihome tool kit then you will only want to adjust the height.

I look forward to seeking people edit my basic tray to fit specific needs.

This is the tool kit i have: I know its a bit pricey but let me tell you. The precision bit driver in the kit is the best i have ever used. It is solid and smooth and I would buy it again.

I printed on my Bambu X1C. It needs support. Use the layer thickness of your choice. 2 walls and 15% infill is perfect for this.