General description The DMT DMT-W8EFNB Double Sided Diamond Whetstone is a versatile sharpening tool designed for both quality knives and woodworking tools. This 200mm whetstone features two sides: the Green side for extra fine sharpening and the Red side for fine sharpening, making it suitable for a variety of applications including carbide tooling and router bits. Its ultra-precision design ensures durability, as it will not break, chip, crack, hollow, or groove. Technical specifications Dimensions: 200mm Green side: Extra Fine Grade 1200, 9 micron Red side: Fine Grade 600, 25 micron Black side: Extra Coarse Grade 220, 60 micron Blue side: Coarse Grade 325, 45 micron Usage Use water for lubrication - no oil, smell, or mess. Can hone all hard materials: carbide and steel.