Tap or Drill Guide Block (parametric, center hole added)

thingiverse

I took @Lemon_Major's original and removed the center section. The idea is two-fold: use less plastic, and hopefully also make it a little easier to align it with the intended target. (While I was at it, also increased the arc resolution for smoother holes. I might have overcorrected a bit, sorry if the STL file is bigger than it needs to be.) Instructions TIP: one design flaw I noticed, is that this block is too tall for the default smallest bit sizes. That is, my 2mm drill bit is too short to even make it through the block, much less into my workpiece. So I'd recommend either changing the height in OpenSCAD when you customize, or using e.g. Slic3r by version 1.2.6 has a trim command that will let you shorten the default STL file.