The tool is used for applications like engine rebuilding, hydraulic cylinders, brake rebuilding and general machining operations. If honing hydraulic cylinders use the intended hydraulic fluid for the lubricant. FLEX-HONE TOOL; FLEXIBLE CYLINDER HONE, FOR 2½ IN BORE, 3 IN HONE L, SILICON CARBIDE, 240 GRIT; Item # BRRBC21224; Mfr. Model # BC21224. EHC: EHC... The Flex-Hone tool is a surface refinishing tool that will is used to refinish and restore cylinder bores. Hone is self centering and can be used with 3/8 or 1/2 chuck drill Flex-Hone Tool GBD60024 Flexible Cyl Hone, Bore Dia.6In, 240 Grit What Grit Ball Hone For Cylinder Brush Research BC11424 FLEX-HONE®, 1-1/4 "(31.8mm) Diameter, 240 Ball Hone Harbor Freight The hone size listed on the product is the bore it is intended to be used for (or slightly smaller bore will work) Buy Omilik 12V AC DC Adapter compatible with Singing SML-385 SML-385W CD CDG Player Karaoke System at Flex-Hone Tool can be used with honing oil or engine oil.