Convenient pocket model 4” Diamond Whetstone™ sharpener with protective leather sheath for easy access to a variety of sharpening, hone or filing needs. Extra-Fine diamond (9 micron / 1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond. Size: 4 1/3” x 7/8” x 3/16” 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 For proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT® products. Made in USA.