Triangular rounded key

thingiverse

We had a lamp post with the lid off. So I printed this key, after fixing it, to put in place again. It's not a constant width polygon, so the sides didn't match. So I sketched over a reference photo with 2 arcs with FreeCad. It perfectly fitted on first try. I have given 0,2 mm of extra margin on top of the height of the triangle. It's a modificable constraint of the sketch. Prints fine without supports. Dirt inside from using it in first photo.