BitGrip

You can support my work by downloading here as well, thank you:
https://makerworld.com/en/models/375537#profileId-275447

BitGrip for standard bits

2 versions: regular and long.
Each version can be printed with inserted magnet.
in that case you need 1 neodymium magnet of size 5x3mm.

Tolerances for version w/o magnet are quite tight. But after some usage I found it ideal.

Version with magnet has a little more play because the magnet is holding the bit, but it would fall out w/o the magnet!

After printing carefully loose the end of the grip so it can move freely in your hand.
I recommend using knife or spatula.

Print settings:
perimeters: 3 (minimum)
layer height: 0.2mm
infill: 30%, cubic
Outer perimeters first 

If you dont use my 3mf files and wanna print magnetic version you need to add PAUSE command in the slicer to put in the magnet.

For the regular version it is at layer 464
For the long version at layer 614

Both for layer height 0.2mm