Flexible with round, abrasive beads fastened to ends of flexible elementsSelf-centering and conform to the bore surface providing a consistent, even surface finish over the usable life of the toolDue to their unique design, these tools provide an "edge break" not possible with traditional honing stonesAvailable for hole diameters ranging from 6.4 mm to 64 mmSilicon carbide grit available in three sizes (120, 180 and 240) to meet your applicationsPerfect for use on engine bores, pneumatic and hydraulic bores, valve pumps and housings, pipes, hydraulic cylinders, stainless steel tubing and moreApplications: Honing, creating cross-hatched surface pattern for oil retention, cylinder port deburring, eliminating inside flashing