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This quick square or carpenter's triangle is a product that can be found relatively cheap at most hardware stores. This product allows the user to make lines perpendicular or 45 degrees from an existing edge. The advantage of making this 3D printable is that it is cheaper and someone who does not have access to a hardware store may be able to obtain it if they have the capabilities to 3D print.
Bill of Materials
This part can be fully printed and no other components are necessary.
Tools needed for fabrication of the OSAT
- MOST Delta RepRap or similar RepRap 3-D printer
Skills and Knowledge Necessary to Make the OSAT
Technical Specifications and Assembly Instructions
Place flat surface on bed and no support material will be needed.
Example orientaion below:
Printing / Slicing Settings
Speeds: Print: 90 mm/s, Wall Speed: 70 mm/s
Layer Height: 0.20 mm
Estimated Cost in PLA: $0.58
Commercial Equivalent: Many varieties of commercial products here is a standard option 
Commercial equivalent for approx $10
3D Printed for $0.58
Cost Savings ~ $9.42
% Cost Savings ~ 94% Savings
Benefited Internet Communities
Woodworking Talk 
DIY Chatroom 
The Woodworking Patriot 
Carpenters Tools Websites