Window hook

I tried using just about everything to hang our Christmas icicle lights in our front window. Year after year what ever I use would fail, until I got a 3D printer. I've designed this clip to snap into the top channel in my sliding window. I drilled a 1/16th hole and screwed in a hook (see pic). Insert the clip on a 45 degree angle and twist until it snaps into place. Now I can hang whatever I like whenever I want with no worry of these ever falling out. These clips hide out of site so they can be left in place until needed again.