Water Shutoff Wrench Adapter

My house is filled with these water shut off valves that are basically SUPER thin metal. Some of them get very stuck -- to the point that I can't turn them at ALL. I've tried wrenches, but that just bends the metal. I designed an adapter for a 19mm socket (will also work with a 3/4" socket). Works very well, and can turn those things even when super stuck without damaging them.