Check out the ultimate printable mini speed square for your keychain.

Features:

• Angles every 10°
• Center finder for round and square things
• Center finder for long thin material
• Draws straight lines in 1/8" increments
• Remember SOHCAHTOA
• Keychain hole

The square prints with no supports at high quality for the text.

The keychain adapter/center finder prints keyring up with supports. I use tree supports