Screwdriver-, Veroboardcutter-, etc. Handle

EDIT: the automaticly rendered thumbnail of the *.scad file misses the handle because the thingyverse implementation of that can't import STL files.

Just a quick modification to the Handle made by OnShape.
My opinion is always __"do not reinvent the wheel"__, so I took their handle design and just changed it a bit to make it suitable to insert other types of stuff, like in my example for a veroboard cutter drill bits.

Included is the Openscad script, you would need the original STL (inclu