The Heavy Duty GBD Series Flex-Hone tools are designed for bore diameters from 8" thru 18" and are constructed using an aluminum sleeve over a lightweight wood core. All tools feature a steel hex drive shaft that is 34" OAL. Heavy-duty Flex-Hones are commonly used for block cylinders or liners, stationary diesel, oil and gas pipes, marine engine and many other applications. The heavy duty tool is recommended for large diameter or high production applications. The Flex-Hone® tool is always used in an oversized condition. Our sizes are listed by the nominal bore in which the hone is intended to be used.
