|This is a reproduction of the original Marlin/Ballard tang sights. The steel base is 1 11/16” long, hole spacing is 1.125” center to center. The staff measures 3”, Vernier scale engraved on the side and the eye disc is tightened to secure adjustment. Nicely blued. Will work for any Marlin or Marlin-Ballard’s. Original mounting screws included.