Honing your handgun cylinder will result in a smoother, cleaner surface that is free from machining imperfections and less prone to fouling and corrosion. The surface will be more regular, hold oil and lubricants better and have a beautiful finish. These hones have a 1-5/8" abrasive surface and a 3" overall length. Notes:The manufacturer recommends the use of Flex-HoneA(R) oil for use with these hones. It is specially formulated for use with Flex-Hone hones FeaturesTwisted steel wire shaftAbrasive globules on flexible nylon filaments1-5/8" abrasive surface, 3" overall length