Features: _x000D_1. Excellent sharpening performance._x000D_2. Double sided grindstone design as 400 grit for coarse sharpening and 1000 grit for fine sharpening._x000D_3. Comes with a silica gel base, non-slip and safe to use._x000D_4. Oval hole design to collect and hold metal chippings._x000D_5. Super fine sharpening stone, perfect fit for knives fine-grinding and polishing._x000D__x000D_Specifications:_x000D_Material: Diamond_x000D_Base Material: Silica Gel_x000D__x000D_Base Size: Approx. 175 x 88 x 30mm / 6.9 x 3.5 x 1.2in_x000D_Diamond Size: Approx. 150 x 63 x 6mm / 5.9 x 2.5 x 0.2in_x000D_(There is some error in manual measurement)_x000D_Grit Type: 400 Grit + 1000 Grit _x000D_Weight: Approx. 354g_x000D_Color: As the picture shown_x000D_Directions:_x000D_1. Soak the stone in water about 15 minutes before using, saltwater is better._x000D_2. Sharpen the knife in the order of the first rough then precise._x000D_3. When you sharpen the knife, hold the handle of the knife with the right hand, left hand fingers are lightly pressed to the edge of the knife, move in a clockwise direction._x000D_4. The sharpening angle is best from 10 to 20 degrees._x000D_5. Do not scrape the slurry off when grind, knife can be ground more of sharpness with the slurry._x000D__x000D_Package Include:_x000D_1 x Sharpening Stone_x000D__x000D_ 1 x Draining Base _x000D__x000D__x000D_Note: _x000D_1. Only whetstone and draining base, no other stuff included. 1Excellent sharpening performance 2Double sided grindstone design as 400 grit for coarse sharpening and 1000 grit for fine sharpening 3Comes with a silica gel base, non-slip and safe to use 4Oval hole design to collect and hold metal chippings 5Super fine sharpening stone, perfect fit for knives fine-grinding and polishing