The hone that floats to the work surface with each abrasive globule working with independent suspension creating a finish that cannot be obtained by any other means. Ideal for surface finishing, cross hole deburring, edge blending in any type of cylinder. Produces an oil holding cross hatch pattern. Grit size 180SC (Silicone Carbide). The flex hone is always used in an oversized condition and the size as listed is the nominal bore size in which the hone is intended to be used. Nominal bore size is 41mm. Suitable for bore sizes from 41MM down. Made in The USA