4mm bit holder keyring

prusaprinters

This holds seven 4mm screwdriver bits.A keyring can be added to the cover (best with 7mm approx. diameter link to attach to the cover)I use this to carry extra bits for my Victorinox Cybertool.I printed at 0.2mm layer height.I needed to lightly file the top of the screw thread to get it to fit properly.I used the file on the Cybertool and one light pass around the threads did the trick.Lower layer heights might make the threads print a bit better.