General description The DMT DMT-W250CXNB Double Sided Diamond Whetstone is a versatile sharpening tool designed for both general and specialized use. The blue side is ideal for general carpentry tools, tinsnips, side cutters, wood bits, and garden tools, while the black side is perfect for damaged woodworking tools, cold chisels, axes, and lawn edgers. These ultra-precision whetstones feature a lightweight and rigid construction, ensuring durability and effectiveness. Technical specifications Dimensions: 250mm Black side: Extra Coarse Grade 220, 60 micron Blue side: Coarse Grade 325, 45 micron Weight: Black side 220g, Blue side 325g Usage Use water for lubrication; no oil is required, eliminating mess and odors. Can hone all hard materials including carbide and steel. The grits are denoted by a dual-colored circle set into one end for easy identification.