Brush Research GBD50012 Flex Hone, HD, for Engine Block Cylinders, 5″ Diameter (127mm), 120 Grit, 17-1/2″ Overall Length

Produces a controlled surface condition unobtainable by any other method. A resilient, flexible, honing tool with a soft cutting action. The abrasive globules each have independent suspension that assures the FlexHone to be self-centering, self-aligning to the bore, and self compensating for wear.