I modified one of those popular boxes and added a bits holder plate. 

Print it at 0.2 layer height 10-20 % infill is ok. PLA or PETG works fine. The bits holder plate can be printed in TPU as well.If you printed in PLA, and the holes are too loose, you can install some magnets 6 mm diameter. 

Check the model here: [https://a360.co/4jBi8N8](https://a360.co/4jBi8N8)

Socket head screw 6 x M3 x 25 mm
6 x M3 Nut