As I was contemplating printing this I saw a comment asking for a screw version and wanted to try out openscad so I made this remix to use an m3 screw and avoid using zip-ties.
The screw hole is automatically slightly undersized from whatever you input as the diameter. I'm using M3 screws. Depending on your material/printer tolerances, be careful threading the screw as if it is too tight, you may crack the thin surrounding areas.
Prints without support
Added text - I removed one of the "knurls" on the handle and added some cutout text for labeling such as M2 or 7/64"
Added an option to use jssammon's Removable locking version. I made some changes though, removing the Z-height compensation because that seemed more like a printer-specific support issue to me, and made the locking channel slightly tighter so it should "snap" into place. Keep in mind, the handle is weaker turning left than right due to the slot made by the locking feature.
Updated the chamfer around the screw-head hole so it should work with larger diameters.
Turned the height adjustment of wrench placement/locking features into a variable at the top.