Grits #3000, #5000 and #7000 wet and dry fine sand paper. Suited for fine sanding and polishing of wood, metal or plastics. Especially for mirror polish finish in knives and cutting tools. 3 pieces each grit cut to size to fit onto rubber sanding block item 88103782. Glue onto a glass plate these fine sandpapers are used in order of #3000 ending in grit 7000 to hone knife edge to razor sharpness. Perfect for honing of cutting tools, knives, utility blades, planning blades, carving tools especially mini carving tools that cannot be machine ground as rapid heat generated would ruin the metal hardness resulting in poor edge sharpness retention. Jewellery crafters, watchmakers , wood crafters especially with hard wood would find fine sanding beneficial .