As others have said, the topic has been debated here "ad nauseam." There have been some heated discussions about the this in the past. I personally don't think it makes much difference which style one uses. They are usually called "transom" savers. In reality, on most boats, there is nothing to worry about concerning the transom. We use them to keep the motor from bouncing around. I use the Lou's transom saver. It, or the traditional transom saver, are recommended by BassCat.