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Order by bore size
The Flex Hone® is always produced and used in an oversize condition. If your bore size is 4" you would order a GBD4", if your bore size falls between two sizes you would order the next size up.
The GBD Series Flex-Hone tools are designed for bore diameters from 3" to 8" .
3" to 4-1/2" diameter tools are 13 -1/2" OAL.
5" to 8" diameter tools are 17-1/2" OAL.
The Flex Hone® Tool should be securely held in a collet, chuck or similar holding device. It is best to use the shortest shank possible for your application.
Always wear eye protection.