Storm Window Guides

These are on the top corners of our Storm Windows. The small screws that hold the windows together in each corner are threaded thru them (see small hole on second picture). The little round points keeps the top of the windows in place in the metal frame. Please help me identify these parts, no idea who the window manufacturer is.

It appears you are correct, enough so that I ordered 10 of these. This website concept is awesome. I thank you for your help.