Brush Research GBD31212 Flex Hone, HD, for Engine Block Cylinders, 3-1/2″ Diameter (89mm), 120 Grit, 13-1/2″ 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.