Don - Jo 1512 Chrome Plated New revolutionary Heavy Duty Commercial Hinge Pin Door Stop. The Commercial Hinge Pin Door Stop keeps both walls and hardware safe without putting stress on the door, the door frame, or the wall. The hinge pin stop hits on the hinge leaf--that's why it doesn't need a rubber bumper! This type of door stop is also great for use on doors where a standard door stop just isn't possible such as where one door opens into another door. It is easy to install, just remove the stock hinge pin from your 4" x 4" or 4.5" x 4.5" heavy duty hinges and replace with the hinge pin door stop. The 1512 Door Stop allows the door to open up to 170 degrees, but you can adjust it to open as wide as you want. Also available in brass and oil rubbed bronze finishes.