Vertical Blind Wand Universal Joint

This quick print allows you to replace the universal joint used in some vertical blinds that use a wand rather than a cord.

The blind uses two 3mm screws to mount the piece in line with the wand.
The single prong of this piece has a 3.5mm hole to allow the screw to pass through.
The other side uses a 3.5mm and a 2.5mm hole. The 2.5mm uses the screw to cut a thread.

I have included two STLs:
One that has a support and the 3.5mm hole partially filled in. 
The other you can print with your own supports.