Trend DWS/CC/FC Credit Card Double Sided Diamond Stone The Trend DWS/CC/FC Credit Card Double Sided Diamond Stone is ideal for fluted, shaped & small router bits, carbide or HSS, turning tools, chisels, plane blades, carving tools & all general tooling. FEATURES A precision double sided credit card size diamond stone Fine 600 grit (25 micron) Coarse 340 grit (45 micron) Complete with black storage wallet Guaranteed for five years SPECIFICATION Size: 85 x 50 x 0.8 mm Grade: Fine & Course  Grit: 600 & 340 (nom. 25 & 45 micron)