For blind or short holes. These stones exert more pressure at the bottom and are better for short cylinders. Set has 4 pieces: 2 holders with integral stones, and 2 holders with aluminum wipers. For Powered or Portable Hones.
►3.5" - 5.5" range (68.6-104.1mm)
►For Short & Blind Holes
►Give a 45Ra finish
Similar to Sunnen N37-J45-71