1,Made of durable diamond material 2,This coarse grinding and fine grinding: 240 mesh -800 mesh. Seal grinding knife, kitchen knife, fruit knife for cutting: 1000 mesh -3000 mesh 3,Metal products: rough grinding with 600 eyes, fine grinding with more than 800 eyes. Glass: 400 mesh to not cut, 800 mesh -3000 mesh smooth 4,13 grit sizes optional. Diamond coated material is more efficient than normal whetstone 5,Use for: grinding stone, jade, seal carving knife, wood crafts, metal grinder workpiece, etc Description: Thin grinding polishing diamond square knife tool sharpening stone whetstone 80 - 3000 grits. Seal grinding knife, kitchen knife, fruit knife for cutting: 1000 mesh - 3000 mesh. This coarse grinding and fine grinding: 240 mesh -800 mesh. Use for: grinding stone, jade, seal carving knife, wood crafts, metal grinder workpiece etc. Features: Made of durable diamond material. 13 grits optional. Diamond coated material is more efficient than normal whetstone. Mini sharpener designed. Easy to take for camping and kitchen garden knives. Specifications: Condition: New Material: Diamond Size: Approx. 17 x 7.5cm / 6.69 x 2.95in Grain Size Options: 80, 150, 240, 320, 400, 600, 800, 1000, 1200, 1500, 2000, 2500, 3000 Weight: Approx. 100-110g Package Includes: 1 x Diamond plate Note: 1. Please allow 1-2mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. In order to avoid rust, please wipe the surface of the water stains after using. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.