Trend DWS/B7/FC Bench Stone Double Sided Fine/Coarse 7x2.5x3/8 inch Diamond bench and worktop 7 inch stone fine & courseA precision hand made double sided diamond bench stone 7 inches x 2 1/2 inches.Precision flatness.Complete with fabric tool holder, cleaning block and non slip mat.Fine 1000 grit (15 micron) and coarse 300 grit (50 micron).Guaranteed for five years.Recommended use with Trend lapping fluid to prevent clogging or rusting and assist in keeping tools clean.Ideal for flattening chisels and plane blades as well as achieving a shaving edge in seconds.Precision flatness gives the ability to also sharpen spindle knives in house.The fine grit is suitable for a finish suitable for carving tools.Specification-Size=178 mm x 63.5 mm x 9.5 mmGrade=Fine & Course Grit=1000 & 300 (nom. 15 & 50 micron)