Sliding T-Square - Parametric for Any Ruler

myminifactory

Add this to any ruler to make a rigid T-square. Add a 3mm screw to clamp it your existing ruler, no modifications required. It's a multi-piece design using a TPU/TPE tab for grip on the ruler, along with a foot insert to distribute the pressure. The screw and beveled edges keep it in place.  PLA or PETG will work fine.    The screw length will have to be at least the wall thickness + nut size + 1.5mm. An 8mm screw glued into any knurled nut out there will do perfectly.   You can edit the design to make a regular 90-degree square as well. The included STLs are for my 51mm (2") and 32mm metal rulers. If you don't have Fusion 360 I can make some common sizes if people request it.