We repainted a pair of swing doors and found the opening came out vertical and square but the doors were not centered in the hole. shim time. Each door had four hinges. After visiting most ACE stores and major stores in our area, I found that pads are hard to come by. Raven comes to the rescue. These pads worked perfectly. Three in the top loop of a sash, two in the first intermediate, one in the second intermediate and we bet. Perfect Alignment. The ability to use layers of waterproofing helped. The material is strong enough for a durable fit. Exactly what we needed.