Sturdy screwdriver for 1/4

This is a basic sturdy screwdriver for 1/4" (6.35mm) bits, the hexagon hole may need some alterations depending on the tolerance.

Since I don't have access to a 3D printer I would be really grateful if someone that makes this could leave a comment about the hexagon size on the tool (aka where the bits go in) if it's correct or not (loose/tight) also if they could test if the smallest diameter is prone to snap (the neck just above the bit holder).

120x40mm size

Kind regards