A portable enhancement to any tool kit is the Mini Diamond 70mm stone in DMT®s signature polka-dot pattern. Coarse (45 micron / 325 mesh) to quickly restore a neglected edge Size: 2 11/16 x 15/16 x 3/16 Sharpening with diamonds is fast and easy. No messy oils neededsharpen dry or with water. Durable construction will provide years of consistent performance and reliable service. For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT® products. Made in USA.