"4SHARPENER, WHETSTONE, UNIQUE CONSTRUCTION; THIN LAYER OF PERFORATED STEEL IS MOLDED INTO A PLASTIC BASE, THE METAL IS COVERED WITH DIAMONDS OF PRECISION SIZE EMBEDDED IN ELECTROPLATED NICKLE; STONE REMAINS PERFECTLY FLAT AFTER REPEATED USAGE; STONE USED FOR SHARPENING KNIVES, FOOD PROCESSER BLADES, HAND TOOLS, POWER TOOLS, ROUTER BITS,CARBIDE BLADES, INCLUDING EDGING GLASS, CERAMIC, CRAFTS & GENERAL INDUSTRIAL USE; BENCH TYPE STONE IS WEAR RESISTANT & WILL LAST INDEFINATELY IF CARED FOR PROPERLY"