The Brush Research BC21218 2-1/2" Flex Hone is a versatile surface finishing tool designed to provide optimal surface finishes on various materials. Available in a range of abrasive types and grits, it effectively reduces Ra, Rk, and Rpk values while maintaining Rvk and Vo for oil retention. Ideal for deburring cross-drilled holes, the Flex Hone creates clean, radiused intersections without the need for elaborate set-ups. It also excels in plateau finishing, removing peaks from prior machining to promote better lubrication, reduce seepage, and extend seal life. Self-aligning and easy to use, this tool ensures accurate results in both machine tool applications and secondary operations.