Developed for smoothing chipped edges of fine crystal, china, ceramic, glassware or any hard material to nearly new. A unique product which answers a problem found in virtually every home. Coarse diamond (45 micron / 325 mesh) to quickly restore a chipped edge. Comfortable 4" (102 mm) handle. Edge repair is fast and easy with diamonds . No messy oils neededuse 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.