General description This Double Sided Diamond Sharpening Plate is designed for effective sharpening of various household kitchen utensils, wood chisels, jade, seals, and carving knives. It features a dual-sided design with a coarse grit of 400 for initial sharpening and a fine grit of 1000 for finishing touches. Made with diamond as the grinding material, this sharpening stone is more effective than traditional whetstones, reducing the risk of damaging the edges of your tools. Technical specifications Material: Diamond Grit: #400 (coarse) & #1000 (fine) Size: 150 x 63 mm Base: 5/16 Inch Zinc Plated Steel Usage Suitable for sharpening kitchen knives, cutting tools, jade, engraving knives, and chamfering glass tiles. Can be used dry, but performs better and lasts longer with lubricant. Do not use on serrated blades. Sharpen lightly and avoid back-and-forth motion to prevent damage to the knife. Do not immerse in water or place in the dishwasher. Other information This diamond sharpening