1. Package Contents: The package includes 7 different diamond sharpening pieces. Diamond sharpening stone including 150400600800100015002000 grit 2. Product SizeThe diamond honing stone measures approximately 17 x 7.5 x 0.1 cm / 6.69 x 2.95 x 0.04 inches, which is the right size for you, and this small size makes it lightweight, portable and very convenient. Silicone anti slip pad on the back 3. Quality Material: Our diamond sharpening stone is made of diamond material, with good wear resistance and corrosion resistance, not easy to break or fade, can provide you with longlasting 4. Use for most cutting tools and cutter knife edges: Widely used for grinding of household knives, professional chef knives, outdoor knives, engraving knives and other knives. More efficiency and durability are less risky than waterstones damage margins. It doesn't need water during the sharpening process 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.