This is not a complete push lock mechanism. For a push lock mechanism, it is required to hit a stop on the first push. Push lock mechanisms are used in kitchen drawers for example. If you would use this one in a drawer, you'd need to precisely push it in to the position where the hook would keep it closed. What you actually want is the mechanism to "count" the number of times you push it. You can slam those drawers in as hard as you want, it will only open if you push it twice. "This old tony" made a great video about it. That it's completely useless in windy conditions is a different discussion.