Thangs
#DIY This tool is the ultimate ruler/square. Not only it allows you to make nice 90 degrees cuts but the parts can also be fitted so that they form a 45 degree angle. In addition to all of that the angles of the ruler are beveled to guide your razor blade in tilted cuts.
Direct link to the original creator's page
Printables
CrealityCloud
Printables
Printables
Printables
Thingiverse
Printables
GrabCAD
This model is published by its creator on Thangs. STLFinder only indexes it: the "View on Thangs" button above opens the original page, where the creator shares the SLDASM files under their own license.
This model is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Yes, the creator shares it at no cost on Thangs. Some creators accept tips or donations.
Check the license (Thangs Standard License) on the original Thangs page. Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer.