Basic Latch v4

I needed some mechanical part that would hold my shades in place so they would not dangle too much in the wind. I couldn't find something that would fit my needs so I sat in front of TinkerCad for a while. This is the 4th iteration and it works for me ;)

The latch consists of two parts that are pushed together. 

I used 3M mounting band to tape the ground plate to the window frame.