Manufacturer Part Number: BCKDBR12|Abrasive Material|Silicon CarbideMinimum Bore Diameter (Inch)|1/4Minimum Bore Diameter (mm)|6.400Number Of Pieces|10Maximum Bore Diameter (mm)|51.00Maximum Bore Diameter (Inch)|2Useable Length|Grit|120Grade|Sizes Included|0.250" (6.4mm), 0.375" (9.5mm), 0.500" (12.7mm), 0.625" (16mm), 0.750" (19mm), 0.875"(22.2mm), 1.000" (24.4mm), 1.250"(31.8mm), 1.500" (38mm), 2.000"(51mm)Overall Length (Inch)|8Additional Information|Includes BRM FLEX-HONE Part Numbers: BC64M12, BC95M12, BC1212, BC5812, BC3412, BC7812, BC10012, BC11412, BC11212, BC20012, pint of Flex-Hone® Oil, BRM Hat, Flash Drive, StickerUNSPSC Code|