Take your sharpening anywhere with the ready-to-go Dia-Sharp Credit Card Fine Diamond Sharpener. Fits easily in pocket or wallet. Comes in convenient vinyl grit color-coded carry case. Fine diamond (25 micron / 600 mesh) for a razor sharp edge. Size: 3 1/4-Inch by 2-Inch by .05" 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.