This is a complete diamond whetstone kit comprised of a double sided diamond stone 3 inch half roundflat file lapping fluid cleaning block and an instructional dvd on their use features and benefits a precision hand made double sided credit card size diamond stone fine 600 grit 25 micron and coarse 300 grit 50 micron ideal for fluted shaped and small router bits carbide or hss turning tools chisels plane blades carving tools all general tooling a versatile 3 inch half roundflat mini tapered