Triangle key for bus stop advertising space

thingiverse

I made a triangular key to access advertising space on bus stops. The key has an external diameter of 11mm. I recommend using 100% infill, but you can get away with 3-4 perimeters and anything above 50% infill. The original key broke after one use, but I've come up with a new design that's much stronger thanks to the metal wire from a 51mm bulldog clip. Simply detach the wire from the clip, straighten it with pliers, and shape it into a "U" form. Then heat it with a lighter and insert it into the holes in the printed part. This triangular key allows access to advertising space on bus stops. The external diameter of the trapezoid is 11mm. I suggest printing with 100% infill, but anything above 50% infill with 3-4 perimeters should hold up. The original key broke after one use, but a new version is much stronger thanks to metal wire from a 51mm office clip. Remove the wire from the clip and straighten it with pliers. You'll need a shape roughly like a "U". Then heat it with a lighter and jam it into holes in the printed part.