Specification Brand : Brush Research BulletPoint1 : Flexible Cylinder Hone made of Silicon Carbide BulletPoint2 : Hone is Made in USA by Brush Research Manufacturing BulletPoint3 : Hone is self centering and can be used with 3/8" or 1/2" chuck drill BulletPoint4 : Perfect for bore honing and cylinder refinishing BulletPoint5 : The hone size listed on the product is the bore it is intended to be used for (or slightly smaller bore will work) ItemName : Brush Research 3 1/2" (89mm) Flex-Hone Cylinder Hone Tool 60 Grit (Silicon Carbide) ItemPackageDimensions_Height : 6 inches ItemPackageDimensions_Length : 14 inches ItemPackageDimensions_Width : 6 inches ItemPackageQuantity : 1 ItemTypeKeyword : flex-hones Manufacturer : Brush Research Material : silicon carbide PartNumber : GB31260SC ProductDescription : 13" overall length, Tool good for cylinder clean-up. Not for final finish ProductSiteLaunchDate : 2010-02-08T05:53:46.000-00:00 UnitCount : 1