This is a very minor and quick remix of kieranram's speed square. That was the most accurate and useful square posted but had a few things I needed to fix to make it as close to a store bought one as possible.

Changes made:
1) Scaled the square up - Original was exported incorrectly and needed to be scaled
2) Base created for the square so it could be used quickly
3) Added a notch to the square to attach to the base

Base is separate so that both pieces could be laid flat when printing for best durability and to minimize waste from supports.

NOTE - Notch should be tight. Light sanding may be required and a bit of glue to hold the 2 pieces firmly together