1.1) 5pcs Sharpening stones set,200 500 800 1200 1500, Made of durable diamond material,Electroplating and spraying process is adopted.Uniform particles and flat surface. 2.2) Coarse Stone 200 Diamond has a large particle size and a rougher surface. It is suitable for rapid cutting and grinding, removing impurities and repairing defects. 3.3) Medium Stone 500 The use of a 500 Grit whetstone can effectively remove tiny scratches and burrs on the blade, making the tool sharper.It is suitable for tools that have been preliminarily ground, or tools that need to be finely trimmed. 4.4) Fine Stone 800 The 800 Grit whetstone is a very fine sharpening tool, suitable for the ultimate polishing and trimming of the tool. The use of an 800 grit whetstone can obtain an extremely smooth edge, so that the sharpness and finish of the tool can reach a higher level.It is usually used in the final polishing stage to remove fine scratches and blemishes, making the blade sharper and brighter. 5.4) Fine Stone 1200 The 1200 Grit diamond whetstone is suitable for fine grinding and polishing of the tool, which can effectively remove tiny scratches and defects, and make the edge of the tool sharper and smoother.This kind of whetstone is usually suitable for grinding highquality kitchen knives, barber knives, etc., to meet the high requirements for tool accuracy and finish. 6.5)The use of 1500 diamond whetstone can achieve finer grinding and polishing effects, which is suitable for the final trimming and polishing of the tool.It can effectively remove subtle scratches and defects, make the edge of the tool sharper and smoother, and achieve a mirrorlike effect. Compared with lowGrit whetstones, 1500 whetstones grind slower, but can provide higher grinding quality. 7.6) Size Information 150x62mm (5.98'x2.44') It is compact and lightweight, suitable for use outdoors, when traveling or when you need to sharpen your knife at any time.