This bench mounted priming tool features a symmetrical design allows effortless right or left hand operation. Its comfortable lever with just the right amount of mechanical advantage seats even the most difficult primers with just finger pressure. It has priming assemblies for large and small primers. The bench primer is made of a water clear tough polyester material that allows you to monitor the primers passage from the tray to the primer pocket. It is able to change primer size or shell holder in seconds. Included the folding tray that goes from box to priming in seconds. The tray has a built-in primer flipping feature allowing direct filling from today s large primer boxes.