4mm hex screwdriver

My 4mm bit screwdriver had broken, so I designed a printable version. You need to install a small magnet (about 6x4x2mm, from cd drive) into the hole to magnetize bits and screws. Worked perfectly for me for more than 2 years. I didn't expect that it can be so strong. Printed in ABS plastic but PLA should also work. I recommend to print it vertically. Feel free to modify it.

"w_support" - added a small round support.
"tolerance" - the hole for bit is reduced to 4.4mm from original 4.6mm (didn't tryed yet).
Printed it with 20% infill without any issue.