Sharpening are made of diamond material and are durable enough to last for years. The high-strength body gives the stone better durability, making it thinner and lighter. Multitasking Knife Sharpener - This set contains 4 different types of grits to meet your sharpening needs, such as kitchen knives, carpenter tools, ceramic knives, chisels. All have a honeycomb design layout for efficient sharpening. EASY TO USE - The sharpener has a non- base for easy control and use. It has a 5.9x2.5 inch face and a wider blade for shape tools. Do not put it in the dishwasher or immerse it in water. Sturdy and Drinkable - Due to the increased hardness, the sharpener can be made into a thin and light body. Compared to other stone sharpeners, these diamond sharpeners are portable and easy to in your bag. Thin grinding polishing diamond square knife tool sharpening stone whetstone 400 or 600 or 800 or 1000 or 1200 grit Colour:silver Material:diamond Size:about 151x63x1mm Package Contents: 5 X diamond grinding knife stone stone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm. 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.