Convenient pocket model 4-3/8"x7/8" #1200grit Diamond Whetstone from DMT is perfect for a variety of small sharpening, hone or filing needs. The Extra-Fine diamond (9 micron / 1200 mesh) is great for polishing and refining a razor edge after sharpening with a coarser diamond. Sharpening with diamonds is fast and easy. No messy oils needed-sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service. Leather sheaf included. For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMTproducts.