Used for tapping plastic, no experience with other materials.
FreeCAD file is attached.
Fits my 2-56 and 4-40 taps.
Modeled after a generic screwdriver.
Printed vertically, 0.2 mm layer, 100% infill modifier cylinder around bore.
Handle is 1 inch diameter x 3.50 inch long.
Tap cylindrical pocket is 0.45 inch deep.
The author marked this model as their own original creation.