This is a 123 block optimized for 3D printing.

123 blocks are a common tool in a machine shop. Technically they are used for fixturing, but they are useful for anything and everything.

Like all 123 blocks, this block is 1"x2"x3". This one has 1/4" clearance holes on a .5" spacing, and .25" from the edges. Normal 123 Blocks also have holes that run sideways, but this makes them not print as well, so those holes were removed.

Printing instructions and hardware links:
https://docs.google.com/document/d/1qq7KFOhIOwTGlyCK7-tqZNmj1Aby3uXWWT_-qkeeEmA/edit?usp=sharing

Sorry for separating the links into a google doc, but Thingiverse tampers with some links causing them to not work correctly.