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Order by bore size
The Flex Hone® is always produced and used in an oversize condition. For example if your bore size is 3 1/4" you need to order a GB 3 1/4" hone. If your bore size falls between Flex Hone® sizes you need the next size up.
The GB Series Flex-Hone tools are designed for bore diameters from 3-1/4" thru 4-5/8" and are 13 -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.