Tap or Drill Guide Block (parametric, center hole added)
thingiverse
I edited @Lemon_Major's original and cut out the middle part. The concept is two-fold: use less plastic and hopefully make it simpler to line up with the target. (I also upgraded the arc resolution for smoother holes while I was at it. Possibly, I overdid it a bit, so forgive me if the STL file ends up bigger than it needs to be.) Instructions TIP: A problem with this block that stood out to me is its excessive height. This makes it difficult to fit standard smallest drill bits inside. My 2mm drill bit can't even make it through, never mind reaching into my workpiece. Therefore, I recommend modifying the block's height in OpenSCAD during customization or utilizing a slicer like Slic3r, version 1.2.6 and above, which offers a trim feature that will let you shorten the default STL file.
With this file you will be able to print Tap or Drill Guide Block (parametric, center hole added) with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Tap or Drill Guide Block (parametric, center hole added).