** The hockey stick one will be used on both sides of the glass on doors with the vent window {1951/1955 1st} The straight one will be used on doors prior to 1951. I attached the whiskers on my doors with #6 stainless steel sheet metal screws. They will screw down far enough to clear the glass. Used 4 screws on each. Be careful not to drill your first hole for the screw to large for the screw. Do a test fit on scrap sheet metal first to be safe.